[ben336]

Looks like they're just formalizing the power-user label pattern to make it more accessible for new users/non-tweakers

[notatoad]

formalizing and automating. having your messages automatically filed into one of those tabs (without having to set up any rules) is a lot more exciting than the fact that the tabs exist.

[Indyan]

This is actually very similar to what Alto from AOL was attempting to do.

www.altomail.com