I don't know about this. Countless times researchers discover the next battery so much better than the current state-of-the-art being deployed, only to find out they just can't scale it. New battery technology is really hard.
"The prototype manganese-hydrogen battery, reported April 30 in Nature Energy, stands just three inches tall and generates a mere 20 milliwatt hours of electricity ... The researchers are confident they can scale up this table-top technology..."
That is a really puny battery. It's 1/10th the energy capacity of a typical watch/hearing aid battery, which is about as small as you can buy retail. And it's 3 inches tall. So system energy density is currently something like 0.001 of commercial batteries.
They should have scaled it up a bit more before turning on the hype machine. It's embarrassing to see this out of Stanford.
Your comparisons are totally irrelevant.
Granted, investments in atomic energy eliminates a lot of the need for storage...