Tiny Gmail improvement

So I'm writing this email, and suddenly - wohoo? - I get a new email in my inbox!

Oh my, what do to? Of course this message will be saved as a draft, but I could possibly lose my train of thought,
and spend a few valuable seconds trying to remember what I was going to write here.

Should I switch context and to check what that exciting (1) might be?

I wish I could just preview it right from the menu on the left!

See the attachment for a quick and dirty animation: http://dribbble.com/shots/671952-Tiny-Gmail-improvement/attachments/60277