I notice that they are quick to launch datasheets for chips that aren't ready for production yet. Take for example the AVR32 flash based devices. Very powerful, cool looking products, but you can't get em unless they're samples which is kind of a pain. 6 months after the datasheets were released, still nothing at the major suppliers.
I dunno if the features are that relevant to an arduino-like product. It's a form of multiprocessing, which is a whole huge can of worms from a software development perspective.
they're competing with intel! ..
Something using an XMEGA is going to be very un-Arduino like!