

I’d say charging cables / most kinds of wires.
People are used to and comfortable with wireless charging these days despite it being spotty in terms of availability.
Better charging rates and capacity to power larger appliances might end up with you having a completely wireless home.
This is more historical as fortunately I was able to work my way up in my industry over the years.
A little over 10 years ago I was living in my first flat by myself. 90% of my income from part time retail went on rent and bills. What I was left with was £4 a week for all groceries, medicine prescription fees, etc. (Travel I considered to be bills because I couldn’t walk to work as it was too far)
I just had to buy the absolute cheapest of everything, bulk deals, etc. Anything I couldn’t immediately afford I’d spread over a few months on my credit card.
Anything health related fell off quickly. I never saw the dentist the entire time I was this poor, and I couldn’t afford healthy food at all. I’m still paying the price for that now. I swear my teeth are 90% glass at this point.
It was an extremely difficult point in my life, but I needed that freedom and independence and would do it all again if I had to.