Would be nice wouldn't it? I don't know why people are pretending it's not an issue in this thread. All of our computers are Macs (New Mac Pro, year old MBP, iMac that's about 4 years old) and not a one of them can reliably stream anything to the Apple TV. Neither can either of our iPhone 5s', or our iPad. It drops at least 5 times over the course of a 2 hour film. Streaming from Netflix is no better. At least 4-5 times in the course of one movie. It's like clockwork, you can literally guarantee it will do it and about a 5 minute range of time where it will happen. Wifi is Apple Airport Extreme, no other router. Just cable modem, and Airport. In a one floor fairly small house with absolutely no Wifi coverage issue. While everyone may not experience this issue, many (a huge number) of people do, it's a real problem. And it's frustrating that you can spend 2 and a half hours on the phone with Apple about it and in the end they just basically say "Dunno! That's just the damnedest thing".
Love Apple products obviously, but I hope this issue is remedied with the new Apple TV, or an update someday.