The key to the 802.11ad standard is an entirely different frequency band. Instead of relying on the 2.4GHz or 5GHz frequencies like its predecessors, it works between 57GHz and 66GHz, depending on where you live.
There is a massive amount of spectrum available around 60GHz facilitates larger data transfer capabilities – but it also carries with it some downsides. The biggest hurdle for 802.11.ad is that, as a general rule, the shorter wavelength mandates a greater absorption rate. The upshot? 802.11ad is going work great in a vacuum, but real-world obstacles like brick walls and wooden floors are going to pose a problem. And therein lies the crux of the current debate.
The new standard is going to work great if you are in the same room as the router. If you are often in other rooms, your WiFi experiences are going to be spotty at best. All of this is why 802.11ad isn’t yet ready for primetime. Instead, most device manufacturers will likely include support for 802.11ad with their 5GHz and 2.4GHz routers so they can still be used at longer ranges. In other markets, 802.11ad may still present revolutionary changes. Its spectrum and signal strength means you may no longer need monitor or television cables. NAS boxes and portable hard drives could also become wireless shortly. Finally, 802.11ad presents very little regarding groundbreaking new features, such as MU-MIMO or even beamforming. At its essence, it uses the same techniques as previous standards but delivers them on the new frequency.