A waste of resources.
Like many sad people, I installed the preview. Once you get past the "I'm not called Metro" thingumajig, it's Win 7 desktop with a few annoying differences.
Win 8 is a tablet O/S for the desktop and, in real terms, not only delivers less bang for your buck but isn't worth a penny.
If this is the future, leave me in the past.
On the plus side, my interest having been stimulated by the prospect of a new O/S only to be disappointed by Microsoft, I tuned to Linux Mint for a laugh. It rocks!