Got Riptide Renegade GP on Sheild TV last night but figured I share impressions here since it also released on Apple TV.
It's another excellent entry to the series. Don't have a total picture of what is in the Apple TV version vs. the standard mobile version that will come out later. But graphics are amazing, especially still considering its under 100 MB. It also has a lot more weather effects huge drops between waves, jumps over buildings and the same wide variety of stunts.
Some may balk at the price, $9.99, but this is a complete package. No IAPs. Numerous modes including a story mode, challenges, boss battles, etc.
The TV version, at least, has 8 player multiplayer and even spilt screen multiplayer for up to 4 people.
I've read that it gets very tough but so far seems fair as I've played two competition series and a boss battle in single player with only a few that I needed to replay.
I'm sure the iOS version won't have split screen MP, but hopefully will keep all the other modes. Probably will be cheaper as well.
If you have an Apple TV (or Shield, of course) and enjoyed the first two games, I'd highly recommend it from what I've played so far even at the $10 price point.