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There's a bunch of videos.
Toyota EVs At The 2019 Tokyo Motor Show: Photos/Videos

Science Magazine article published tomorrow. I agree, future of electric vehicles is battery technology.
The coming electric vehicle transformation | Science

Overview:

Claims: https://www.youtube.com/watch?v=2LqVcffdT1A

Claims summary:
1,000Wh/kg
50,000 cycles
<$50/kWh
Non-flammable

Compare with current batteries:
180-250Wh/kg
300-6,000 cycles depending on depth-of-discharge and other factors (i.e. temperature)
$200/kWh
Flammable

They're already making batteries for on-grid utility use, though reading between the lines, those are not the high-density (1,000Wh/kg) ones. The high-density ones are in laboratory testing so far.

I'm encouraged because these seem to be real, not some fantasy by one of the many fly-by-night scam artists we've seen before making similar claims. This is the sort of thing that could make EV's genuinely practical and cost effective for most people, rather than the high-cost, low-range niche products we have today.

We'll see over the next few years if this pans out or not. There have been many...