S'alright, by definition I doubt any of us are in a terrible rush or concerned with brevity. I get Viqor's point but I also think bfreedma's point trumps it. The only real limitation is how small and efficient you can make an amp, how well you can isolate a DAC against interference, and how dense you can make battery power. And they are getting better at all that all the time.
I accept that, at the moment, wireless headphones may all sound inferior due to design and size restrictions (I have to take peoples' word on this - I don't own any), but as I said a bit ago, history tends to make fools of people who predict what can't happen.