I hope Unity will attract that kind of app designers to Linux, like the ones that use Macs. I've tried using Linux several times in the past, and one of the reasons I didn't like using it, is that the apps (programs) looked so ugly and rough compared even with the ones on XP. For me, at least, that's kind of a deal breaker.
Most user interface designers and programmers gave up on the Linux desktop and moved over to Macs years ago. The Linux desktop is like Perl 6. Don't hold your breath. And if it finally arrives, hold your breath and don't breath in, because it stinks.
Even if good user interface designers attempted to contribute to projects like Gimp, they would quickly be driven away because of politics and NIH.
