Apt-X is a very good thing but for $99 you can get an Apple TV and send audio (losslessly!) over Airplay. You can also use a program like Airfoil to send audio from your computer to the Apple TV. The ATV has an optical out and can go into any DAC you may have. Of course, the advantage here is for those who don't have Apple devices and don't want to put money down on a DAC/receiver/whatever.
Apt-X seems like a big step forward, approaching the fabled "good enough!" even for those of us seeking high quality. Who knows where we'll be at in five years - well into complete transparency even from our mobile devices, hopefully.