To be fair, it's an impressive showing for what it is. I'm a lot more interested in it than I would be a new iPad. Not totally sold yet, but of course that's because I'm not crazy for a tablet like most other people.
The iPad changed the way we think about computing in many regards, so when I see the way a lot of people react as though they expected MS to reinvent the wheel, I can't help but laugh at them. This is MS jumping into that market. No more, no less.
The Steve Jobs cult will continue to carry on, but really, it's a legit product and has potential. Frankly, most of these consumers, bloggers, and journalists alike would never be satisfied because they're sheep for all things Apple, and it's sad.
The ipad changed how we think about computers but was really a logical extension of how we stopped working on our home computers and were far more about consuming - so the ipad fits that perfectly.
Windows 8 potentially takes that further - it recognises the need for the collation of information in an easily readable form to help us make sense of all the data that is around us, whereas ipad really is still a dumb bunch of icons (world leading, most and best apps, sure, but its still a grid)
I hope this gets some traction, and I also hope it shows apple that there are other ways of doing things. I think its possibly just the right balance between the control of apple and the openness of android (which can be too much sometimes). If it gets enough app support then its a completely viable alternative to an ipad.