Thought for the day...
Eventually, I suspect, the high streets will only be populated by shops with stuff we can't or don't want to buy on the interweb (e.g. haircuts, coffee, bacon sandwiches, posh delicatessen stuff, some groceries, kebabs (MMMMNNNNhhhhmmm!!) etc.).
Clearly mobile 'phones no longer fall in to this category although we might want "showrooms" where we can go an touch/feel things before we trot off home and order from Amazebay or whoever. John Lewis remains a massive high street presence (never in Hertford more's the pity) but is also a big player in internet shopping.
I think when local planners/landlords accept this and proper adjustment is made we could create something interesting and vibrant with local character (no I won't go to Starbucks).
Leo - love the headphones!