I'm a completely casual game in the sense that: basically the only games I've ever really played and enjoyed that much are GTA and Skyrim. I have an Xbox and a gaming PC, because people talk about video games as if they're really fun, but I have just never actually been able to materialize that for myself.
I figured the next GTA was never coming out, and that they would just keep milking the current one until the end of time.
This leak showed that not only are they working on it, but it looks really cool.
I have a tough time seeing how anybody would see this leak as a negative. The game looks great.