Well, if you have a recent Mac not being used, you can fire up Amazon Prime and Airplay it over to your ATV.
We've done that a few times but, honestly, the whole Amazon Prime experience has me thinking we won't be renewing. The selection is rather poor and not growing, everything is search-based instead of giving a good discovery/browsing experience, and worst of all specific videos (ex, we've put the Comedy Central Presents stand-up comedy series on as background noise quite often; there are a number of those hit this issue no matter how many times they are restarted) have horrid connection issues for some reason (it's not our ISP either; we went from 3Mbps DSL which we thought was the cause of the issues to 15Mbps+ fiber, and we still have the same issues with the same frequency on the same episodes of the same shows).
Hulu has ads, which is annoying, but we can ignore them / find something to do while they are on. Netflix is the likely replacement for Amazon Prime. Other than AP, the ATV handles the others we use or might use directly. But, the fallback position is always the Mac Mini the kids use for homework can be used to drive the TV when we're all sitting down to watch a show (and with the iPhone acting as "remote control" mouse on the Mini, it's a workable setup).