Assuming that analog isn't part of the requirement and that AC power at the speaker is not an issue:
Wireless isn't a speaker issue, per se:
For example: Take a pair of the big, powered Meridian speakers with built-in DACs. Get them a quality digital signal and they're definitely high end. These (may, or) may not be your particular cup of tea, but they are pretty clearly an "audiophile" product. So, the only question becomes "How do you get them a quality digital signal, if you transmit it wirelessly?"
Given current wireless digital technology, I can't imagine that it would be much of an issue, but I'm not sure who's selling a quality solution for this application. Sonos offers one solution (via the zone player's digital output). However, Sonos only accepts digital input signals wirelessly, so it's not a purist solution. Someone out there probably offers a similar system that allows wired digital inputs, I'm just not sure who it is.
So, my first answer to your question is: "I think we're probably already there".
However, if your question is more geared toward a compact, all-in-one, rechargeable (i.e., truly wireless) speaker system, that's a different story. The best integrated solution of that type that I've heard is the Soundcast Outcast, which is designed for outdoor use. It's quite good for its intended application, but that's not as a high-end competitor. And it ain't small, either.
Bottom line: If you look for a wireless digital distribution system, I suspect that right now you could assemble a "speaker wire free" speaker system that is very, very good. Just not small, cheap, easy, or "clean".
Marty
Wireless isn't a speaker issue, per se:
For example: Take a pair of the big, powered Meridian speakers with built-in DACs. Get them a quality digital signal and they're definitely high end. These (may, or) may not be your particular cup of tea, but they are pretty clearly an "audiophile" product. So, the only question becomes "How do you get them a quality digital signal, if you transmit it wirelessly?"
Given current wireless digital technology, I can't imagine that it would be much of an issue, but I'm not sure who's selling a quality solution for this application. Sonos offers one solution (via the zone player's digital output). However, Sonos only accepts digital input signals wirelessly, so it's not a purist solution. Someone out there probably offers a similar system that allows wired digital inputs, I'm just not sure who it is.
So, my first answer to your question is: "I think we're probably already there".
However, if your question is more geared toward a compact, all-in-one, rechargeable (i.e., truly wireless) speaker system, that's a different story. The best integrated solution of that type that I've heard is the Soundcast Outcast, which is designed for outdoor use. It's quite good for its intended application, but that's not as a high-end competitor. And it ain't small, either.
Bottom line: If you look for a wireless digital distribution system, I suspect that right now you could assemble a "speaker wire free" speaker system that is very, very good. Just not small, cheap, easy, or "clean".
Marty