You can connect Apple TV to your TV and it’s pretty good. It only costs $99 and you get iTunes, Youtube, Netflix (North America only). But if you live in Europe I find it best to connect a MacMini to your projector TV or large display and add a VPN service like Witopia so you can surf as if you are in USA and get Hulu, Pandora. There are instances when the opposite is true. When you want to Spotify for example it is best to appear in Europe. In any case once you have a MacMini connected to a large display you have the keyboard problem. You can use a long wire to cover the distance that people need to seat away from a large display, say 3 meters (sorry I hate inches feet). But a 3 meter cable is ugly and inconvenient. You can also get a Bluetooth keyboard but then you have another problem and that is that large displays work great to watch movies, TV but poorly to type or surf because the print is too small from the right movie viewing distance. So there are two solutions. One is to use an iPhone app call Remote which is great but you will still have the problem of not seeing the small print from Movie viewing distance. The other one, the one I use, is to use screen sharing. Here’s a tutorial on how to use it.
The biggest advantage to use Screen Sharing in a MacBook air is that you can have BOTH a surfing experience and a movie watching experience. You surf on your laptop but you look at Netflix or any movie platform on the large display.
If Apple TV had a keyboard I could go for it. But I find the way in which you need to input information in Apple TV horribly annoying so the MacBook Air (or any mac laptop) plus MacMini connected to your TV is the best solution.