1024QAM can give up to 10 bits/s/Hz spectral efficiency

8 MIMO antennas will give 8 time some data rate

1024QAM and more require huge SNR values which are only realistic with close proximity between stations.

The date rate printed on a WiFi product package is what you really get at home

WiFi provides better connectivity than a cable

WiFi has a central coordination similar to moblie radio (LTE)

1024QAM could give up to 12 bits/s/Hz spectral efficiency

80MHz bandwidth and more would present interference to all neighbour stations

Higher center frequencies allow for higher data rates

Higher frequencies allow for higher signal coverage area

The frequencies around 433MHz, 868MHz, (915MHz US), 2.4GHz allow end-users to operate own radio equipment.

There is no free available spectrum below 2.4 GHz for new broadband services

Noise is more a problem at higher frequencies

Mobile radio service providers pay a lot to get access to new spectrum taken from abandoned services

The power level of all applications must be the same in order  to meet regulations.

All frequencies and bandwidths are subject to rules and regulations