First thing I'll do? ? obviously I'll try not to waste to much time looking at the screensavers. And then I'll realize that that's exactly what I will have just done?
I will likely watch the newest episode of Homeland on Showtime if I get the Apple TV on a Monday. Otherwise I will probably check out the app store and see what is available at launch.
I would use the track pad and keyboard on my 21" iMac. I would also use the keyboard with my iPad Air 2 when I'm on the go between clinical rotations. I love how the battery is now built in and rechargeable with the ever ubiquitous lightning cable.
I would use AirPlay right away. I'm looking forward to a lag free experience that I've been having with my 3rd Gen Apple TV. CrossyRoad on the big screen would be wonderful!
First activity would be to download all the rocking apps that would be available .... I hope there are some good ones ... Plex is the one I am waiting the most. Would also like to try Siri while watching a movie ....
As a recent Windows Phone convert and only having Miracast on my TV, I need an AppleTV so I can use Airplay for photo viewing. HBO Go would be a huge plus as a don't have a cable box in the same room!