The announcement at MWC was not intended for developers. The people at the press release were journalists. They don't know or care about developer stuff, so there was no point in talking about it then. So, I'm reserving judgement until MIX.
As far as the cabs and customization goes. The more I think about it, the more I realize that the different customization's that I
apply are basically going to be moot from what I'm seeing.
I will say one thing that I always say in situations like this. Please don't limit your concerns to forums like this. Go rant on every single Microsoft forum. Go talk about this on Channel9. Get ahold of Scott Guthrie himself (ScottGu's Blog
). He's the big cheese who runs the org that builds the mobile developer tools. He's a nice guy and does respond to customer concerns. Better yet, he's still a developer at heart.