802.11n roll out was kind of weak with so many devices only supporting 2.4GHz band. I'm really looking forward to 802.11ac and the various new features and improvements to the standard that will help considerably in todays more modern wireless environments.
Of course the cheap low-end devices don't support 5ghz. But look at any decent hardware product such as $50 and up routers and business class notebooks and they all have it.
Just so you know.. there aren't really any USB 3.0 dongles out there.. so you won't get the full throughput using usb 2.0... in Hard drives 2.0 maxes out around 60-65MB/sec, and by contract 1gigabit is at least double that... and the ac spec is something like 1.3gbits, though real world puts it somewhere around 800mbits... with built-in 802.11ac laptops to the router... usb 2.0 cripples ac to about 500megabits..
Pricing will be way sky-high initially... This will pave the way for a decent deal on a dual band N (plus gigabit ethernet) router & dual band dongle combo.. which is plenty for most people.
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