I'm thinking about this for awhile. In a day to day life, normal people doesn't actually use their local network at all most of the time.
We mostly use home routers to connect to the internet. In this case, the wifi bandwidth shouldn't actually bottleneck the internet bandwidth. Since most of the time our internet connection is way less than that. In my country, most of the people barely use more than 100Mbps of internet connection.
So, if thats the case - isn't most of the dualband routers are overkill and a waste of money?