Gaming on the go. Will it kill the Windows OS?

With Windows 8 looming and expected to be a full touch screen OS, I found myself pondering what might come of the PC industry.  Remember the days that you would call a tablet a PC?  I do, and that's how the world seems to be turning.  With W8 becoming a full touch platform, can it hold up against the likes of Android OS, iOS, and other small platforms on this format?  This is what I'm prepared to find out.

Smartphones -

According to Nielsen.com, as of November 2010, the Smartphone market is still ruled by Apple's iPhone, with Android devices taking huge margins of emerging sales, and huge cuts into the market share of RIM (Blackberry) overall.  Windows Phone 7 still hasn't made much of a cut into the market, proven as the market share for all other smartphone platforms leaves only 13.1% for theirs, Palm, and the Nokia platform.

Tablets -

The Wall Street Journal reports that after the third quarter of 2010, Apple's iPad owned nearly 95% of the overall market share in the tablet industry with a large cut being made fresh into the market by Android tablets, such as the Galaxy Tab by Samsung.  Does this market, highly influenced by the Smartphone apps available on those platforms which dominate it, have any room left for Microsoft's PC platform to make a transition?

PC -

In a category which is obviously dominated by Windows, having Apple and Linux barely nipping at the heels, Netmarketshare.com provides the details:  PC, 90%.  Mac, 5%.  iOS, 1.7%. Linux, 1%. Other, 2%.

The question that arises:  If Windows is a very stable market in the PC industry, why change the formula?  Because Microsoft knows that the numbers are against them, and that the Tablet is a larger extension of the super-intelligent mobile handsets we all use today.  Does a change for Windows mean a revolution in computing, or have we already quietly reached that revolution?  Is Microsoft to late to catch the winning pony?  I believe so, but for as long as there's business to be done, we will still be using a platform that supports office programs, not just flashy gaming, and a beautiful interface.