LOOOOOOOOOOOOOL. MATE is already doomed. Look at Ohloh. At GNOME2s prime it had around 200 active commiters keeping track of a multimillion LOC code base. Many talented people with deep knowledge about the code. Even many paid full time.
MATE? a few guys doing a few commits while having beers and pizza in the basement. Mostly moving stuff around and renaming. When 200 talented people decide its time to move on, then 2 free time basement hackers can do nothing. This is just building up momentum for the most hilarious fork&fail ever. Here is a .gif for you to show the MATEs future.
http://i.imgur.com/Gmh39.gif "funny idea, then downhill, then boooom...."
Yeah we all know Clem at Mint is pushing it. Why? Because it scratches an itch for haters&ranters unable to adapt to changes forced by a new Shell. Clem is doing nothing but giving them what they want and not what the future is all about. You can do alot of crazy stuff on GNOME3 with extensions.gnome.org or random extensions from the nets.
Today marks another attempt to save those old habit hung dudes. Lets hope for some success.