While it is relatively new now (2011/09/15), are there any resources for explanations of Metro applications for Windows8?
I've not seen anything at the moment that summarises an "elevator pitch" for them.
Check out my extensive answer on Stack Overflow.
There are plenty of relevant sources available indicating their 'elevator pitch', and new information is made available at a regular interval on the BUILD blog.
The article which will probably interest you the most talks about 'Designing for Metro style and the desktop'.
If you have time to watch it, I got a good impression of where they want to head to from watching the keynote of the BUILD conference.
For immediate hands-on experience you can download the developer preview.
From: http://dougseven.com/2011/09/14/i-know-what-youre-thinking-and-youre-wrong/ (A Telerik Executive VP's blog).