The only people I hear spouting about new domain name extensions (gTLD's) are the one's who have a stake in their success as a registry or those looking to recoup their investment. Truth is with the scarcity of good dot com extensions dwindling at less than insane prices, good .com domain names are going up in value. The time to buy is now while traffic is slower over the summer months and before the market starts to pick up again in the fall. If you're unaware of all the other extensions and when they came about, there is an info graphic here at Key-Systems.net from a few years ago.
When buying a gTLD, ask yourself when was the last time you went to one, and where does the the majority of spam come from? I think you'll find that the answer is a .garbage extension. Registering one of these will drive help traffic to the .com, .net or .org domain names respectively above it. There are 882 domain extensions at last count, but your customers just know of the top three. If you're looking to increase your brand or to expand a product line, while the US economy is beginning to soar again, buy now before prices return to pre 2005 levels. There is a market correction coming that will swing .com names up beyond any levels we've seen them at. Get them before they turn into gold.