I’ve done a bit of work in the WiFi Alliance, especially in the areas of quality-of-service (QoS - WiFi calls it Wireless Multi Media, or WMM), and video capable requirements. The most recent work by myself and colleagues was to convince the WiFi Alliance that 802.11n 2.4GHz operation should not be allowed to use the wide, 40MHz, channels, but rather be limited to the more narrow 20MHz channels. Only 5GHz operation allows for 40MHz channel usage, and therefore the super-high throughput that 802.11n is supposed to tout. Why did I push for this you ask? Well, 2.4GHz is a *really* noisy spectrum, and allowing a wider bandwidth in that spectrum would *really* degrade the experience of all other devices in that spectrum. 

Also, for the WiFi consumer electronics (CE) profile (which has a bunch of power saving features and more that you would want from CE devices), 5GHz operation is mandatory! So at minimum, CE devices that have 802.11n connectivity will provide 5GHz. They can also provide 2.4GHz if they want, but the less noisy 5GHz connectivity (with wide 40MHz channels and higher throughput) will ensure a better experience for video. This in-turn should result in better user satisfaction and less product returns.