This claim is pretty accurate. Since the standard isn't finalised yet it will be a while before the hardware is developed to make it widely used in mobile devices, as it's improbable that a software encoder could be made that uses little power.
Well at least this time it will be much faster then H.264, Hardware decoder are already in the work with many things could be reused fro H.264 HP Decoding. So unless there are any major changes HEVC decoder will be coming much quicker. Some Video Decoder IP has already begin to list HEVC decode as a feature.
