Microsoft isn't going back to the classic shell. And there's little reason for someone to emulate it completely. You will get that alternative start menu if you want it, but not much more.
Obviously I meant 3rd party, I don't expect much from Microsoft

*support for future directx revisions that arent available with Win7
Completely irrelevant as long as my graphic card does not support it.
*cleaner boot process resulting to faster bootup speed
I use SSD, in practice I can no longer even take a piss while OS boots up, because it is so fast already.
*cleaner kernel resulting in smoother OS performance
*leaner build resulting with less resource demand on all categories(drive space, ram space, cpu usage, gpu usage, etc.)
Would be nice to have at least estimated performance improvement, especially on my relatively high end rig.
*refined user interface which targets faster interaction, eliminating redundant aspects of the previous UI. (needs some time getting used to)
This one got me excited, searched for some vids of it on youtube, even got interested when I saw the start button in the lower left corner, then BAM! clicking on it opens up a fullscreen window full of hideous colours and buttons huge enough to insult my mouse targeting precision. Here is what sucks, none of my nerdy... eh knowledgeable friends use win 8 so I never get to see how much you can actually customize it. I will probably buy an extra rig just for the purpose of testing shit out on it, since I don't want to experiment with various OS on my main rig.
If no one buys it then why did they hit 100M copies sold?
OEM