The best page with all the ISOs (VS in all editions and TFS Basic) is MSDN
http://msdn.microsoft.com/en-us/vstudio/dd582936.aspx

So far, it looks good. Lots of nice touches like editing the start page MRU project list (at long last).

Unfortunately a lot of the really nice new stuff is Ultimate version only (all the new UML diagrams and architecture validation and intell-trace historical debugging). The coded UI tests/ UI test recorder seem to be premium edition only.

I suspect most of these (and the other high-end features) will need to drop to professional SKU to be widely accepted (as MSTest was when VS2008 came out) - oh well, looking forward to 2020 :)