I think you're right. Would the planned interconnect to France provide the power generation requirement? Personally I think nuclear is the way to go anyway, especially the upcoming GEN6, but no new plants are being built and they take decades to get from planning to completion. The supply side of it may be feasible when you can recharge at home, but a large majority of people living in cities dont have that luxury. What about people that do mega miles? Long commutes, sales people etc? At the moment a model 3 is the one of the few EVs that can fufill the range requiremnt of my daily commute, they aint cheap though!
Batteries tech will improve, but its incremental and I dont belive there will be an enormous increase in capacity within the next decade. Unless a serious investment is made in infrastructure this plan is wishful thinking.