MS isn't making the desktop obsolete, just giving more options for the user interface...
The more I use W8.1, the more I like it. While initially, I missed the start menu, that's no longer the case. Switching between the start screen and desktop is fast and with the start menu customized, opening applications is quicker than doing the same with the start menu. The chances are that my W7 desktop will get W8.1, when available in October.
There are "features" that I don't like with W8.1, but as long as I have control of these features, I like it.