I just purchased a Roku 3 and also have an ATV3. I like the picture quality better on the Roku, but do like the grid layout of ATV much better. Especially for browsing movies on HBOGo.
What I am amazed at is that Neflix dosen't have profiles. Every other device i have that can stream Netflix supports profiles. iPad, Sony Blu-Ray, ATV, PC, PS3/ How is this NOT on the Roku.
Is it Netflix or Roku? And of course the much discussed lack of youtube channel. I wouldn't have thought I would have missed it but having had it on ATV and not having it, I am in fact missing. it.
I like to collect all the youtube clips that I see throughout the day, browsing on the ipad and then view them on my 70in TV via ATV
Overall, I have to say that even though ATV lacks all the channels, I foresee myself going back to it, over the Roku.
I bought the Roku for the added channels, like Vudu and Amazon Prime, spotify, etc.
Seems like Roku is one decent update away from having it all. Hopefully it is sooner than later. I really like the box and I think the picture is better and the channels it has are great....