It's a scheme - consumer know ".com" and nothing else. Well, in other countries, their local gTLDs, too, but those new domains are an obvious scheme.
I've even seen some adds actually say 'Google [word]' to find them instead of putting a URL, (or worse, 'Search [x] on Facebook!')
Best spend the money (USD 500K+) on SEO, or on simply improving the content and freshness of your existing site.