Nokia must hide WP7

   In order to sell the phones with WP7 , Nokia will have to hide from the potential buyers the fact that its phones has a Windows operating system . So, why bother switching away from Symbian ?
Taking into account the fact that Microsoft and Nokia lost about half of the market share in one year , one can estimate that in the next year they can loose another half of what's left ...
So, it's probable that when Nokia will actually ship phones with WP7 , the combined market share of Nokia-Microsoft ECOSYSTEM will be aroud 10% ...
What will hapen with Windows 8 on ARM ? Will Microsoft advertise the fact that
you will spend less time with an ARM Windows 8 tablet ? ( in contrast with an iPad 3 )

Report warns Windows Phone 7 suffers from the "Your-dad-uses-it" syndrome

Gartner: Android and Apple win big globally in Q1

Microsoft sells 1.6 million Windows Phone 7 devices in Q1

Android, which Google executives said is being activated on 400,000 devices daily, tripled its market share from Q1 2010, with Samsung, HTC and Motorola shipping the lion's share of these phones.

Microsoft must adapt WP7 for tablets
So far, Microsoft has said that it plans to offer Windows Phone 7 on smartphones and Windows 7 on tablets. But that’s a mistake. As Apple and Google have shown, adapting smartphone-focused operating systems for tablets is actually a much better idea. Plus, with the growth of tablets in today’s marketplace, bringing Windows Phone 7 to slates might help improve the appeal of Microsoft’s operating system. The time has come for Microsoft to think seriously about bringing Windows Phone 7 to tablets.

Verizon HTC Trophy Windows Phone Can't Alter Microsoft's Prospects

 Microsoft’s Windows Phone sold 1.6 million units in the first quarter of 2011, according to new data from research firm Gartner. Although that pales in comparison with the number of Apple and Google devices activated during the same period, Microsoft executives’ traditional defense has been that Windows Phone is selling at a comparable rate to other first-generation platforms.