Well, I will make this one short: I have promoted GNU/Linux since 1997. Since Ubuntu came in the picture I am more and more confident about introducing people to the free software world and offering them a nice experience. The last years I have really just been very satisfied with what I have and not been so keen on promoting it beyond the people that really want to try it. Unity is changing that!
Now I feel our desktop is a better desktop than the competition (***which is Mac OS X and Windows***). I can truly say that Ubuntu as a free software computing platform does everything most people I know need. And additional (proprietary or not) tools that run on Ubuntu as well do the rest.
Unity 3D on Ubuntu 10.10 running on Mutter is slow. It works and it’s ok, but it’s a pain (after a while) to run even in my PC (Lenovo X200).
Unity 3D on Ubuntu 10.10 (Mutter)
Unity 2D is FAST! Really fast! I have not had this feeling about my desktop in at least 3 years. It just flies! And a constant development of the platform is getting me all excited!
Unity 2D on Ubuntu 10.10 (Qt) on Dual Screen
Unity 2D Desktop on Ubuntu 10.10 (Qt)
As you see from the screenshots, there are some shortcoming in the real life use of the software itself (works like a charm with one screen) which I am sure will be resolved over time. Wayland may even play a role when thinking of these improvements.
I am looking forward to the Alpha 2 testing for Natty (Ubuntu 11.04) with the Unity 3D now being based in Compiz. These are truly exciting times!
With Unity I now *WANT* everyone using the Ubuntu desktop as I believe it brings the best of the free software stack for everyday computer users: Gtk and Qt, Ubuntu’s solid Hardware support, attention from ISVs and it Just works®!
Thank you to everyone for making this happen! 
