This is for sure true.in China 1000km is a "symbolic" range, as it is the distance from Beijing to Wuhan
Regarding the perf : 144.4 kW & 2200kg; => 7km/kW, it's 7.3km/kW for the e40, so efficiency isn't extraordinary
they get to 1000 km range with a HUGE battery which is environmentally unsustainable
as BMW said: i think the issue is not the km range, but charging networks
If batteries get to a point where you get 1000km from a battery equal in weight of the i4 battery, i would pick the 4-500km option at half the weight and probably reduced price, over a 1000km battery i would use once or twice a year at the cost of carrying 200kg around for 15-20000km to save 1 hour charging on those two trips. 6-800kg 1000km battery is useless to me at this point.
When charging nerworks reach a good capacity, this is already the case in Norway, almost nobody really needs more than 500km range if you can charge at home. If you think you do as an average person with a daily driving range of less than 150km, you need to consider the extra load you carry around 345/365 days a year to save very little time in the end..
I think the range hype will die out and get replaced by concern for battery lifetime, weight and ofcourse charging speed.