People sayin' it's a flash in the pan, but he's almost 3 years running and blowing up more each year... also he's just starting to get those upper mainstream looks too. When those artists come knocking (and you know they will cause that's what they always do), I wouldn't be surprised if 2015 is an even bigger year.
That said, let's not jump the gun with the Neptunes comparison just yet. Right now, he's where the Neptunes were in 2001. Huge year for them, and were coming off a good year in 2000 too... but then 2002-03 was INSANITY. If he has his 2002-03, he's there, or at least in contention. I ain't about to deny his dominance right now. And you know somebody's on fire when there's songs out there copying his sound to a point you can put em right in with his records and wouldn't know he didn't do it (see: Teddy Riley, Dre, Puff/Hitmen, Swizz, Neptunes, Lil' Jon)
Best thing about it, IMO, is after years of mega-slow records dominating the party and radio... FINALLY we're going back over 90 beats per minute. Them slow rap jams were killin' me, seriously.