if the jit works well along aside of dalvik vm then we'll have a decent device with decent applications, what am wondering if how will they have stuff like back buttons, I mean you can implment the home button with a swipe or flick or whatever there calling it, but just having a random back button will

A. look ugly
B. meh
C, will it break uniformity? over the system?

I get people hate Dalvik because it's so much slower etc etc etc, but the thing is after using it for a few months it doesn't seem to be that much of an issue, I haven't faced any real slow downs, and Dalvik VM along side its JIT is working very quickly.

So really I think Dalvik is a good thing. Just depends how they implement it over there own UI

edit: and if you really want to write code natively there's the NDK for that.