What item do you hope will be obsolete in twenty years?

But we need our vacuum tube television sets and radios

@PerfectionOfTheHeart If electronic devices reach the quality of wired systems then I'd be okay with it but I absolutely reject the idea of discontinuing wired products before it happens and good quality wireless products will be available to broad public for reasonable price. Removing the jack from smartphones was the most idiotic step regarding changing the design in this century so far.