I wonder how much we should care about mobile market.
Most people still using Windows for gaming, personal use, company use , embedded system (e.g., ATM).
Many education institution still teaches Microsoft lock-in stuff.
Linux desktop or Ubuntu desktop's share is still around 1% niche.
Think about GNOME's 1010 (have 10% share at 2010) goal and the reality.
We really need certain share in desktop market.
Even in mobile market, Google's Linux based Android is successful. Other Linux based system virtually all failed. A notable company even switched to the Windows Phone camp.
It's a pleasure for me and probably other "life hackers" to see Ubuntu runs on Nexus 7. But this kind of stuff won't change the market landscape in any way.