What qualifies as "good thing" for WP8? Device sales, period? Android has over 70% market share and still lags iOS in terms of profitability from a developer standpoint. The best apps still begin on iOS. Why is that?
Because selling ten million cheap Android handsets to Asian markets doesn't strengthen the Android ecosystem as we see it from a "Western" perspective (for lack of a better term). In fact, selling a hundred million cheap Android handsets to any market doesn't strengthen the ecosystem at all, other than forcing certain services to at least support the platform. Even then, you see instances such as The Next Web pulling their magazine from Android. What, you say? Oh, right - Apple's petty <20% market share garnered TNW 80 times the downloads that Android's >70% market share did. A tonne of cheap, commodity handsets might serve to slap the Android name around, but they don't make a case for the brand other than "everyone's using it". Who wants to write software for laggy QVGA devices?
I'd argue that the same can be said for Windows. Yes, it does hold some pretty key software for some of us - but many software categories are far better served on the Mac side of the equation (two I'd point out: fully fledged to-dos and web publishing software). And nine times out of ten, a Windows version of a piece of software will look like Windows 95 trash and the Mac version will look stunning in comparison.
Microsoft needs two things: one, more and better apps, and two, it needs to fix its flawed software. Neither are solved by market share alone.