Not only the recent announcement of their Surface tablet is getting blood back into the veins of Microsofts’ attempt to be the 3rd player of mobile/tablet ecosystems.
In order to reach that goal you need to establish a large developer base that is giving you enough attention and provide 1st class apps. This year Microsoft hosted over 850 developer session, that is 3 times as much as last year, which had a positive effect regarding to Flurry:

Microsoft’s Share grew 600% within the last 12 months and the Windows Phone has now 6% of all new project starts vs. 1% for RIM’s BlackBerry. Probably more impressive than outpacing RIM is that in June Microsoft Windows and Android project starts were equal.
“From Google’s point-of-view, this must move Microsoft from a mobile app ‘also-ran’ to a competitor who has kicked started momentum and is mounting a campaign to reel in the second place player. Time will tell.” quotes Peter Farago at the Flurry Blog.
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