since they appeared, long time ago, they hold more or less the same features.

Let's see two examples:
Google-chrome, they improved it with the tab-bar and everyone loved it.
UNR, they get rid of it and put the caption and controllers in an applet (windows-picker) saving lots of space.

The gnome title-bar is poor in features and ugly too. It's allways in the way of who tried to make gnome look fancy. Think, do you really look at the caption, or you just use it to close or move the windows? If I wanna know which window is the firefox one, the last place I look is the caption.

I heard about there's some difficult to find a name following the ubuntu partner with K, so I'm suggesting the name kamikaze kiwi as in this beautiful video below.
http://www.youtube.com/watch?v=sdUUx5FdySs

edited:

Kamikaze (神風, Kamikaze literally: "God-wind", "god speed", "light wind", "spirit-wind" or "divinity-wind"; common translation: "divine wind")[from wikipedia]

this makes kamikase suitable for a release that intend to be faster, lighter ...

A very useful applet lost its utility since something made it auto hide every time we click on a empty area. there's no sense in "remember that I should remember anything". The expected behaviour of one sticker note is stay where I put unless that I move(hide / remove) it.

ubuntu should have a webcam control panel app where would be possible to set configurations like brightness, colour, exposure, etc while we are using the webcam in any application.
maybe some effects too.

make possible to have more than 1 windows list placed on the panels showing different contents. some windows are shows in a windows list other in a different windows list.

you will can decide witch windows list to use by bragging a windows or the its representative icon on a windows list to another windows list.

the gnome should remember the last windows list a program was docked (if you want).

all this have no sense without the fact that you will also can change the behavior for each one of your windows lists. you will can decide to show only the icons (small, normal, big sized),miniatures, titles, one menu that condenses all the windows assigned to this list in a single icon.

it will open lots of possibilities to the users organize their desktops. I can tell what I would do if I had this feature:
1- put the programs that I use in background in a list of only icons (system tray but I will not depend anymore of the application's capabilities).
2-nautilus windows would be all in the same list windows showing their titles.
3-the rest of the program I would place on an only big-icon window list, since I find easier to distinguish shapes and color than words.

basic use case:
1) open a contact's message windows from pidgin. (some one who ask you howto use a tool per example).
2) press a button and the curso turns in a cross indicating that you can track a rectangle, track the rectangle.
3)the pidgin offers to your friend to receive the video stream of your desktop area. your friend accept.
4)Now your friend can see like in a webcam windows frame what you are doing inside that rectangle.

easy and fast, without worry about IP, ssh tunneling, permissions, since you can select just the needed area the transmission will occur faster and clear than in VNC, you won't need explain what VNC is, you won't need know what VNC is. Only a simple and useful feature that the people realize by their-selfs how to use it.

I believe it's time to start brainstorming about gnome 3. Creating a new category in our brainstorm we will have a good pool of ideas and also a profile of the ubuntu's users concerning what they are waiting for gnome 3 before the coding really get started.

Ubuntu as main dist that adopts gnome as default will get involved in this project sooner or later. So let's start contributing.

please add alarmclock to the repository. https://launchpad.net/alarmclock

lite app that permits us scheduling task/reminder easily, similar to the kalarm.

transparent objects are very nice and it's always present in mockups end new themes. Unfortunately, when we are using transparency, the text in the foreground is often messed with the background(part that would be hidden if the actual element was not transparent). Sometime it's impossible to understand what there is.
it can be solved by reducing the contrast or blurring the background (only under the transparent part). my suggestion is include wherever the transparency is used the option to blur the background on compiz. even more sophisticated effects can be taken to blur.

I think wobbly is a plugin that can disturb who doesn't like it. it's too noticeable to be activated by default. tired eyes can get "injured" by the changes of resolution and distortion that take place and we are moving a window.
I agree that it's an applet that calls attention from potentially linux users, but it's unlike fades that make the use of the computer more smooth, it distracts you when you just want to move windows making you lose your focus.