Phil - they have told the media, told developers to expect very few changes in the RTM version from what it is now. They have said it repeatedly. Authors writing books and articles on Windows 8 have been told they will be fairly safe to finish up their writing now, as the end retail product isn't far off, as not many significant changes will be coming.
I'm not telling anyone what to think, if you like it, I'm glad for you. For every one person that can make any sense of it, there's a heck of a lot of the rest of the population that find it to be a jumbled ball of nonsensical mess. If you like it, great - in the end, it's just a preference thing.
The concerns about W8 on tablets go a little deeper - they are trying to sell Windows 8 RT tablets as enterprise devices, knowing full well they do *not* support many things that would be required of them in a MS enterprise network (like AD). I find that to be shady as hell. But hey, they offer something called "Management Lite", which gives the end user the ability to add their own apps to their devices, taking the point out of AD networks entirely. Active Directory is ubiquitous in large networks - support should be mandatory. Full support, not just SSP and RSD. If it's a Windows device, admins need to be able to do their jobs via methods already existing.
If I may ask though - is it a good enough product, a fresh enough concept that you are willing to shell out money to buy, say the retail boxed versions to put on your own personal machines? Is it that good of an OS that you will pay $100+ to put Windows 8 your current machines?
That's always been my question, whether people love or hate it, MS *are* going to be shipping it on all new OEM machines soon. It *will* be in widespread usage not far down the road. Are users going to be howling at MS, demanding downgrades to Win 7 from Win 8, just like they did with Vista to Windows XP? Are retail customers going to be compelled to go out and purchase W8 to install on their current Windows 7 rigs?