Not this again!
Haven't we beaten this subject into the ground yet? Or is it just that somebody wants to keep it rolling until enough people scream "Enough already, I'll buy it if it will keep you quiet!"
Whatever the Microsoft apologists might say, the battle lines were drawn on this subject a long time ago and there's little sense in dragging it out now. We know that there are people out there, possibly a large number of them, that don't like the unholy wedding of TIFKAM and the more traditional interface minus its "start" button because it doesn't work the way they want it to in the desktop environment. Likewise there are folk out there that like W8, especially in the touch environment which is pretty much where it was targetted anyway, so it's likely that most desktop/laptop users will go to W7 instead (or Linux).
We also know that the tablet and the smartphone are being taken on by more and more folk in the home, in quite a few instances as a replacement of a PC rather than as an addition as they don't use a PC for anything over and above what they can do with a tablet, and W8 is a latecomer here in comparison with Apple and Android.
And before we bring up the thorny subject of Windows 3, consider how long ago that was, what we had to run it on and all the effort that has gone into improving the front end, including Windows in its various guises since W3, Apple's various revisions since System 7 and all the various GUIs on Linux. (Yes, and RISC OS too!) W3 was pretty much a menu system, the equivalent of the Start menu on its successors, and nothing more, so it's a bit pointless to compare it to any of these.
W8 has its benefits when it comes to a touch screen environment, but it will struggle to beat the systems that are already dominant in that area. It may be years before Microsoft makes a dent in the fondleslab market and will only do it with an intuitive front end, something that W8 fails at in some areas. As far as the PC market goes, however, W7 and WXP are tough acts to follow and W8 just doesn't cut it.
There. I said it again!