Re: Good news, everyone!
There are plenty of better battery designs out there, but your issue is always going to be cost and volumes.
As pointed out, creating a new battery design is great, but unless they can be mass produced (think thousands per hour), for a price that doesn't break the bank, then it's a no go. However, it may be possible to take a bleeding edge design, tone it down and get something better, but not amazing.
Take LiPo batteries, they were developed from tech in the 80's starting to be packaged in the 90's but then see how long that to to get into commercially viable products.
So this is not just around the corner, but maybe 5 or 10 years away before mass production.