This would make a nice Eulogy
"Microsoft may still win the tablet war?"..... no not so much.
Microsoft became the modern version of :"IBM of the 1980's", too big to fail to huge to change. Vista release set the stage for future disaster. Windows 7 pumped half the water out, but Windows 8 has opened a new gaping hole in their marketing strategy. Tat combined with unclear direction to developers early on, nope, they are an also ran when they should be leading the industry.
Microsoft is suffering now from same problem that faced IBM in the 1990's. Too many irons in the fire, unclear future, slipped release dates. R&D is great, problem Microsoft is coming to the market with a product that is functionally obsolete.
you only get so many "do overs".....IMHO Microsoft is on their last one.