Additional hardware, and expensive hardware at that is not, and should not be touted as a possible solution.
There was all this fuss and emphasis on how it should run on existing windows 7 systems potentially even with similar or better performance, so why then gimp it by forcing in a ui experience which is simply not designed for the typical hardware a windows 7 user would have.
Nobody else has gone for this consistent UI route across products with considerably different input requirements, so there was no reason for Microsoft to do so.
iPads and iMacs do not have the same interface, for a good reason.
As a start menu replacement, as a launcher then the start screen has potential, but the schizophrenic behaviour with switching between desktop and the modern UI and the considerably different approaches required for common tasks is simply adding complication for the sake of eye-candy.
By far most of the real improvements to the user experience are on the "legacy" desktop, a place where I would expect to spend most of my time, and would not be surprised to see most other users either.
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