>>It will be quite evident to me. Anyone who has been in computers for any length of time can tell when DirectX and/or OpenGL is drawing to the screen. It looks about 10000% better than the crappy 2D stuff they are using now - and it's a heck of a lot smoother. I think it will be evident....or there would be no reason to justify changing over to DirectX.<<
I meant as far as ease of programming/use of the api. I doubt (besides the total overhaul of the api they're doing anyway) that it will be much different to program for the gui. Just, like you said, it will look waaay better and have new features. What I meant was that windows programmers won't have to learn DX to make windows apps.
As far as having a problem with it, I don't really. I'm partial to opengl though .