▲ ▼ Wireless headphones glitch when out of range
It is really annoying when the music on my headphones starts to glitch the moment I move away from my mobile/ipad, I mean what's the point of it being wireless for a very limited range, obviously bluetooth is a low power tech and won't give you the ranges that technologies like wifi promise but for a start it would be great if headphones had the capability to store the next 10-15 songs so that I don't have to worry about keeping my phone with me all the time.
There can be other applications of the tech like an inbuilt walkman/ipod inside the headphones but my concern for now is to nothing but to improve the music listening experience.
I've faced this issue when listening to podcast and having to pee(I don't take my phone to the restroom).
There have been bulky headphones with built-in audio player for a long time and there are newer sports headphones like these - https://www.amazon.com/Waterproof-Conduction-Headphones-Earphones-Spa%EF%BC%8CBlack/dp/B0865PFFW4?ref_=ast_sto_dp . They could solve the music problem, But for something like podcasts which are updated every day I don't think headphones with memory could address it unless it has built-in mechanism to download/sync podcasts as well.
As you've pointed out, Range of Bluetooth comes at the price of power but there are range extenders like these - https://www.architecturelab.net/best-bluetooth-range-extender/ which could address that issue. I haven't tried them, When I last explored that space it seemed like they were catering to the enterprise problems like legacy IoT in large factories. But the ones mentioned in the link seems promising for a home use as well.