The post you are reporting:
If general retailing is losing out to the internet then the "high street" needs to reinvent itself as more of an entertainment venue.
This should include restaurants, cafes & bars, as well as galleries, cinema, music venues, clubs etc.
The other thing the "high street" could do is greater specialism around not only food and clothing, by which I mean small speciality shops, fresh food retailers (butchers, fishmongers, fruiterers, greengrocers, cheese shops, bakers etc. - think Borough Market) but also small local retailers of things like hi-fi and tvs, computers, where they offer personalised service as well as decent pricing, art, gifts etc. Of course to achieve this "high street" rental values will need to drop to the level of the secondary shopping areas these types of retailers currently inhabit.
It will reach a stage where landlords drop rents as some rent is better than no rent and also local authorities will start to agree to change of use to deliver this.