I have bought some .coms to accompany the DotMobis.. perhaps thinking down the road of selling both as a brandable package.
"Mobi" seems to be a hot word these days in .com, and "mobile" will most likely affect other extensions. Yes, the mobile revolution is for all existing brands in all extensions.
To be honest though, I haven't left much the .mobi treasure chest as every $18 I am still thinking of what else is worth it to buy .mobi. Someday, it will be more closed off like the .com (which has turned off many people coming to domaining past several years because not much of new registrations had value mainstream - the notion that "all the .coms were taken..").
But there is hope that .mobi will greatly open the eyes of the average person to "registering a domain name" (in other extensions that are available) and domaining as a whole; and, raising the values of all Internet Real Estate extensions alongside.
If domaining is to get hotter to the mainstream timely, I'm thinking twice now on keeping even some of my good .names hehe One day they might be a scarce collectible in this trade, as long as ICANN holds par.