Oh, no! Not the “planned obsolescence” catfight again! 
Well, yah, but every time I ever bring up that point, I get called a “conspiracy nut”. 
Why cure cancer when you can simply “manage” it for years if not decades?
And with all the tek journals I get, “pioneering breakthroughs” using gold nanoparticles, stem cells, retrovirus therapies, “targeted therapy”, infrared/radiotherapy heating, etc., umm, when was the last time, or any time, you heard anyone being treated with any of those?
So I just quietly smile and nod when I hear people extolling all the good people in research and pharmcos who would love to be heroes and finally cure cancer, that money doesn’t mean anything to them.
Guess people have “planned obsolescence”, too. Keep them coming back for more therapy that gets billed sometimes 10kbux/mo, rather them just cure them and have happy’n’healthy customers.
But yeah, back to batteries (before I get dogpiled on)), incremental improvements is what it’s all about. Keep people happy enough with “longer running” doodads, just until they get used to it and start demanding more performance. Instead of having to recharge your mp3 player, phone, etc., pretty much every day, sometimes twice per day (old boss used to keep his phone in a charging stand every lunch because it’d run out of juice so fast), give ’em a few days worth of runtime. When phones get bigger hungrier displays, have to stream video, etc., and performance goes to Hell again, improve the battery tek a little more, and make ’em happy enough to buy new batteries (and new phones, mp3 players, etc.).
Whups, guess that sounds like “planned obsolescence”…
Yeah, it’s years or decades before it ever becomes COTS.