I thought the same. I mean, you don't need vast technical advancements to build that anyway, though the battery would likely cost approximately $20,000 USD with

I thought the same. I mean, you don't need vast technical advancements to build that anyway, though the battery would likely cost approximately $20,000 USD with current technology. It isn't necessarily obvious that really unconventional things would need to happen to get that down to ~$10k, and most uses would work with a much smaller battery than that.