Yeah, they're ok, but nothing special, as far as I know. I've only had t/a from Hectors but been in Artisan many times. Having no kidneys and limited on drinking volume, every cuppa has to "count" !
I don't know the future of the high-street, but it will undoubtedly be different. I suspect what will happen is someone with great imagination will come up with novel uses for the shops, something we've not thought of as yet. It would be a shame if they just dissolved to flats. If I knew what...
I doubt it. There's still the same number of "shops" but the type will be different. What will change is the driverless cars plus the drone shuttles that will start appearing. Drone transport will be the next big thing.