The winner will be ICANN who laughs all the way to the bank with hundreds of new gTLD registration fees (equalling tens of millions of US$). The losers will most probably be companies like uniregistry.com (or, more specifically, their investors) who will register tens of new gTLDs and later find out that they are not worth as much.
I wish I could put this comment to the top of the page. How many TLD/ccTLDs are there already? The primary interest being served here would seem to be ICANN's. As a user, I may well register some of these new domains, but I'm kind of looking at it sidewise atm.
What value does it bring? Just more dilution of the already huge namespace for the most part.