An Apple TV 3. Note I said, not very well. It stutters so much it's basically unwatchable.
Just thought I'd clarify something in case someone came here from a Google search: my wife and I use AirPlay mirroring to watch Hulu on our Apple TV everyday, and there's no stuttering at all. If you experience stuttering, it's a good idea to try to hook up your AppleTV to Ethernet instead of wifi for a faster connection.
There ARE black bars on the left and right sides of the picture (aka "letter boxing") when doing AirPlay mirroring. This is because the iPad has a 3:2 screen ratio, whereas an HD TV set has a 16:9 ratio. "AirPlay", which works with AirPlay enabled apps, WILL fill up the whole 16:9 screen; "AirPlay mirroring" will letterbox, since it is essentially mirroring the iPad's display to your TV set.
Believe it or not, while some apps (purposely or not purposely) have failed to implement AirPlay proper, there are some other apps that go out of their way to explicitly block even AirPlay mirroring. HBO GO falls into this latter category whereas Hulu is at least merciful enough to let us have out AirPlay mirroring (despite not offering AirPlay proper).
To clarify, there are 3 categories of apps:
1) Apps that have chosen to let you AirPlay video to your AppleTV, in full 16:9 glory. The built-in YouTube app does this, and offers an easy-to-discover AirPlay icon in the corner of the video. The NBC app surprisingly allows full AirPlay as well, but interestingly, they do not offer the easy-to-discover AirPlay icon. Instead, you must open the multitasking tray on the iPad by double clicking the home button, then drag the tray to the right to reveal the airplay menu, where you can choose to AirPlay the NBC app in full 16:9. (Is this an intentional obscuring of AirPlay by NBC? I don't know, but hey at least it works).
2) Apps that have failed to implement AirPlay video,
yet they do not go out of their way to block AirPlay mirroring. These apps fail to implement AirPlay either intentionally (often due to business decisions), or unintentionally (due to esoteric technical reasons or the developer is unaware of AirPlay or doesn't have time/attention to implement it). But the semi-good news is that you can stream a (letterboxed) version of the video from the iPad to the AppleTV by accessing the AirPlay menu from the multitasking tray, choosing the AppleTV, and then flipping the switch that says "mirror". The ABC app and Comcast's Xfinity app also fall into this category.
3) Apps that have failed to implement AirPlay video,
yet also go out of their way to intentionally block AirPlay mirroring to prevent you from using the workaround I just mentioned into category 2 above. HBO GO does this. When you attempt to use AirPlay mirroring, it explicitly tells you "We're sorry, we can't offer HDMI-out from this device currently", and that "we hope to offer this functionality in the future". It sounds like they want to let you AirPlay, but something is holding them back (film studios? I don't know).
Interestingly, you can still watch HBO content (via letterboxed AirPlay mirroring) through the Xfinity app as a workaround.
So to recap:
NBC: yes AirPlay. So full HD 16:9 streaming.
Hulu: no AirPlay; but yes to AirPlay mirroring. Thus letterboxed streaming only.
HBO GO: no AirPlay; no AirPlay mirroring either. So no streaming at all. "You're gonna get no AirPlay and you're gonna to like it!"
Keep in mind that the status of these apps can, a likely will, change at some indeterminate point in the future. All it takes is an app update (where the app finally enables AirPlay), or an AppleTV update (where Apple explicitly adds a "button" to the AppleTV interface for that service, in the same way that Netflix is offered as a built-in service for AppleTV).
Final word of caution: the original iPad, released in 2010, is not capable of doing AirPlay mirroring. It does not have the horsepower (or at least Apple doesn't believe so), therefore it's not even an option. So if you have an original iPad, the AirPlay mirroring workaround that I mentioned above for Hulu will not work. Regular AirPlay will work however. So, for example, the NBC app will work.
Confusing? Someone should make a website that tracks the AirPlay status of various apps so that the general public can make an informed decision about buying an iPad, which version to buy, buying an AppleTV, and paying for video subscription apps like Hulu plus.
