WiFi at 60 GHz provides a theoretical data-rate of 7 Gbit/s. The trade-off is limited range and penetration. The main reason for this awesome data-rate is a 9 GHz bandwidth, from 66 GHz to 57 GHz. I think this is country/regulation dependent, so 7 Gbit/s doesn't depend on the full 9 GHz bandwidth. Instead of focusing on increased frequency, why not scrap all the obsolete bands and reassign the 1 GHz - 6 GHz range to WiFi?
The range and penetration of the 1 GHz - 6 GHz bands limit suitability to home usage. Therefore, does it need to be regulated as part of a global spectrum? Regulations should ensure availability of some bandwidth for other home uses only:
Punch out some small bands for bluetooth, cordless phone, TV remote, etc. (below the 1 GHz cutoff: cellular phone, NFC, etc.)
Adaptive frequency hopping to avoid local interference (other routers, microwave, etc.)
Backport latest technology from previous standards: QAM, MIMO, etc.
Make the standard versioned so newer features can be tacked on without requiring a whole new range.
Right? Now tell me why this is a pipe dream.