I agree that a lot these new technology is overhyped. That being said, majority (I would anecdotally argue more than 99%) of new founded science never make it

I agree that a lot these new technology is overhyped. That being said, majority (I would anecdotally argue more than 99%) of new founded science never make it to the market usually due to market limitation (too expensive to make) and adoption (fear of new technology). Battery technology can definitely use a boost but 5 years is nothing on a project scale for a new technology. Making something is super hard. Making something that the market adopts is even harder. Think about the digital camera. Minus the amount of time to develop the CMOS sensors, the "first" digital camera was made in 1975. It took 20 years before it was a consumer friendly device. It took another 20 for us to have the cellphone cameras today.