The best wireless earphones are the ones you don't have to wear.
It works like this... You simply turn on your CD/Tape/whatever source and amplifier, make sure your good speakers are connected and switched on, then sit back as the sound waves pass wirelessly thru the air to your ears.
Of course, everyone else around will be blessed with the same high quality sound... wirelessly!
On another train of thought... Sony figured out how to send audio and video via infrared from their Handycams to your TV. Many remote controls speak IR two-ways. How much extra cleverness would be required to design a handheld remote, with an earphone-out plug, that could pass on the audio sent via IR to the remote? Better yet, how about a remote like a color Pronto, that could receive audio AND video, then SHOW IT ON THE LCD? Preview TV channels on the remote, before switching the TV to the one you want! I'd buy one!