- Metro interface, seamless user experience on desktop, laptop, tablets and smartphone (still in 7.5). I don't really like the big blocks, and would prefer to use the old desktop.
- Storage spaces, is it disk virtualization for all ? according to Microsoft, Storage spaces were designed to be highly scalable supporting from just a few Terabytes to Petabytes, interesting for home users... http://blogs.msdn.com/b/b8/archive/2012/01/05/virtualizing-storage-for-scale-resiliency-and-efficiency.aspx.
Microsoft said Windows 8 public beta to be launched in Feb 2012, then let's see final features in a couple of weeks, before saying if businesses will start upgrading to Windows 8 in 2013, 2014, 2015 or never. I remember a couple of customers at a conference who said Windows 7 will be their last Windows version on desktop, having in mind a lot of large companies still have only Windows XP as standard OS images.