You might want to reconsider that knowing that the web browser is the most used app on both the iPhone and Android:
Internet Explorer Mobile browser will be a mixture of Internet Explorer 7 and Internet Explorer 8 desktop versions
Source: http://en.wikipedia.org/wiki/Internet_Explorer_Mobile
Seriously, I don't know where to begin dissecting your assertion that "Microsoft has a pretty great mobile OS in Windows 7". To start, it would be prudent to point out that Windows Phone 7 is not even out yet, so who knows how great it will turn out to be. The screen captures so far seem a little bit low on usability to this smartphone user, but it's obviously a bit early to be making such a judgment. At this point, we don't really know whether MS has an ace or a turd up their sleeve.
Seriously, though, what's the deal with iPhone fans giving a shout-out to Windows Mobile 7 constantly? It's a little transparent.
Your Android points are so far from reality that I don't even want to engage in that. Android complexity? Security?
The truth of the matter is that iPhone owners who wave the flag see Windows Mobile 7 as the crippled kid that they try to promote as the alternative to Android, singing its praises as a weak distraction. Every teenager saw this transparent technique play out, and I would hope that we can all recognize it for what it is now.
http://channel9.msdn.com/posts/LauraFoy/First-Look-Windows-P...
http://gizmodo.com/5471805/windows-phone-7-series-everything...
For the record I own an iPhone and an Android phone. I've owned a BlackBerry, WM6 phone, Palm Pre, etc. If I had a third front pocket I might consider buying a WM7 device.
I like that MS tried for once to think outside the box: maybe it will be good, maybe it will be crap. Ironically everything I hated about MS (trying too cover all the basis, doing me-too products) seems to be the way Google is going.
But that doesn't mean I want Android to do badly. I just think the mobile market is still young and there's a lot of innovation. I like a good competition, and I appreciate when a company, ANY company, tries to do a serious product. I could not care less that it's MS, Nokia, or Palm.
Id buy a Nintendo like iPhone.