I just logged in to Webmaster Tools and after clicking through to a site's dashboard, I'm seeing a completely new layout. It actually looks pretty good on an HD display (1920x1080) but not so great on my laptop.
One thing to note: It's impossible to view data at the moment; After loading a page, I'm getting redirected to something that doesn't exist, namely:
Query details: utm_source=en-wmcmsg&utm_medium=wmcmsg&utm_campaign=bm
when I click on "Query Details".
Pretty shabby to release something with obvious bugs.