Right now.
If you asked me a decade ago, I probably would have said 1998...but everything is fucking awesome right now and it's only getting better all the time. People like to bitch about "DLC" and "Day 1 Patches" like they never pined for an expansion pack to their favorite game (any Shogo fans up in here?) or never had to dial into a long distance BBS just to grab a patch that would then corrupt any of their existing save games. 2015 is fucking cool as fuck and I can't wait to see where we're at in 2020.