When it comes to marketing, which a domain name and extension is, it is important to get good results.
Right now a .com is more reliable and seen as better than new domain extensions, about which, the general public don't really know about.
People might want new items, or content from the site, but they couldn't care less for the extension. However, if it is not a .com, .net or .org they might get confused.
Depends on who you target, taking a new extension is a risk.