I've had vague thoughts about it. I had an Xbox 360 in the last generation, loved (still love) the hell out of it and is probably the best console I've ever had. I have a PS4 now and I'm really enjoying that so I don't really need one, especially as imho the PS4 has better games. With that said, while I can't speak for the Xbox One the 360 had a much better interface and controller than the PS3 and PS4. There is one game series in particular I will miss though and would tempt me into the One if they make some good ones...

You mention Gears of War and that was one of the games that really captured my imagination. Ignorant people dismiss it as "Oh it's stupid chainsaw gun macho" but actually the soundtrack, the characters and lore are fantastic (better than halo's dreck, sorry) and the art direction is just out of this world. Gears of War 2 is my favourite - I'm sure you'll have a great time with them!