Once it becomes widely adopted I doubt this will be much of a social issue. The value they provide is real. It's not some gimmicky thing. Tangled wires are extremely annoying and happens nearly every day I use them. Plus the wire gets in the way going jogging or caught on something with normal usage, etc etc. Lots of benefits to having wireless headphones.
Talking to yourself with a non obvious headset will always be awkward looking though.