We mustn't. however, forget all the work that's being done with regard to demand response and load balancing.
All it needs is a relatively bit of kit, probably in the form or a replacement consumer unit. that would enable you to specify load preferences, peak permitted consumption, time constraints and so on by individual circuit.
So you could do stuff like automatically drop the ASHP while you have a shower, only permit EV charging at low-demand times, give the cooker precedence over the heating, and so on. There's no reason why a well-managed house should get anywhere near breaching 80A/19KW at peak loading. Spread all your needs out over 24 hours and you have a total available energy budget of over 450 KWh/day, which should be enough for anyone unless they want an aluminium smelter in their back yard too.
The technology is all there, it's used in commercial installations now but I'm sure a simpler system could soon be made available for domestic settings. My solar system has a simple implementation allows remote control via Zigbee of devices by specified demand and preference order, which does a lot of what would be needed.
Nick's point about cost is quite right though, electricity is going to get very expensive in comparison to the artificially low prices we've been paying for the last few years. I've been warning about this for yonks now, but today I see that EDF has fronted up to tell us to expect 50% price increases. If they can hold it that low I'll be impressed. And don't expect to leave it to competition in the market, there won't be any, it's the wholesale price that's the problem and that won't be sorted for years thanks to our government's inability to implement a proper long-term energy strategy. (Cue lots of grumbling about how at least when we had the CEGB we didn't have to worry about that sort of thing, but which has been largely ignored since privatisation).
