It's got more application in a server room than it does in the home. Range will be no better (and probably worse) than 5Ghz on your 802.11n routers and the amount of 5Ghz frequency it requires is simply put: ALL OF IT. So you won't be able to place multiple routers in an area, because they'll stomp on each other either at the AP or the endpoints.
This is a standard for (at best) a home audio/video system where all the components are nearby and for a server rack where you use wireless as a second network to communicate between servers. For home device use, most of us will be better off with 802.11n
And BTW, 802.11n is *still* not being fully utilized. You can get 600Mbps (air speed) per frequency out of a single 802.11n router if you take full advantage of its spatial abilities. The best I know of is 450Mbps per frequency. Ruckus probably makes the best APs out there right now.