It's early days for the not-quite-finalised next-generation Wi-Fi standard. Final approval of the draft standard is not expected until early 2014, but like the .11n standard before it, this hasn't stopped some manufacturers diving into the deep end.
What do you get from 802.11ac? In essence you're buying yet more bandwidth — beyond 1 gigabit per second available overall at its best, and 500 megabits per wireless stream. That makes good room for multiple HD video streams, and even Ultra HD down the track.
While the routers are emerging, other devices are limited. So buying an 802.11ac router is about preparing for a future where TVs, smartphones and laptops start including the standard around 2014 and 2015. An 802.11ac router is also often a very good 802.11n router, so you're not losing out on the best of the current generation of Wi-Fi by stepping forward today.
To get the full benefit of 802.11ac today, you'll need to invest in some .11ac adapters to give your devices compatibility.