For the last 2 years or so my Xbox 360 has been used for nothing apart from playing Peppa Pig DVD's for our 2 1/2 year old lad. And the occasional bit of media streaming from my main PC. GTA V will be the first game it's seen shoved in its disc tray for quite some time. 
I'll be buying it on PC too.

I'll be buying it on PC too.
This time I will happily just wait for the PC release. I have much better things to be doing than playing the inferior version as a preview.