With 80Mhz bonding in 802.11ac already in play and 160Mhz optionally in Wave 1. Wave 2 will bring 160Mhz capability. Of course that won't really work under the previous spectrum as then you only have enough spectrum to two channels. Eve with the 100Mhz added and if another 195Mhz was added, the channels are still limited. The real gain will be in just using 80Mhz channels but for home use, 40Mhz is really all that is required. 802.11ac makes sense for people that have 300Mbps or more for Internet connectivity though which is where I fall, but even then, I really have to try to reach 300Mbps. Even if four TV's were streaming from Netflix/Amazon/etc. and downloads going on, 300Mbps is hard to achieve.
More spectrum is nice though as the 5GHz band starts to see more use.