WP7 phones have rather tight hardware requirements [1] that to a degree influence the general handset. I fail yet to see how Nokia can top that (Maybe coming up with a better Camera/Zeiss optic. Maybe putting quite a lot more power in the handset - but the first option would be more for a niche imo and the second would cut into margins if you want to be competitive).
Sure, it's all just speculation until we see their first devices. But at this point I remain unconvinced that Nokia can differ enough to dominate the WP7 platform.
