What strikes me is how the Apple TV is really in the "good enough" zone for iOS and recent Macbook users. After so many years there's no clearly better solutions to show some random content on the TV.
I'm an Apple fanboy, but the Apple TV DRM-crippled walled garden isn't anywhere near good enough for me. I simply want any device to send a signal to my TV. It's trivial with cables, modern wireless technology can cheaply carry high quality signals, and the only thing standing in the way is the copyright mafia.
There's absolutely nothing stopping you from loading a DRM-free h.264 file on another one of your Apple devices and streaming that over AirPlay. And HTML5 video in Mobile Safari works beautifully.