I have an older tablet with an SSD and it still works great, but it's very different from Windows 8 and does not support touch let alone multitouch.  Yeah, I'm disappointed that it's taken so long, but Microsoft doesn't make hardware (usually).

Win8 metro on tablets is apparently really nice ... haven't had a touch monitor to try it out yet. 

WP7.5 on a Lumia 900 is absolutely fantastic, however; that much I know.