You do know before there was sing star there was karaoke revolution, right? And MS had a music mixer game also?
And I don't even know why you think guitar hero is fucking relevant at all.
EDIT: also, if I wanted to do what you are doing, I would say sony is late and copying MS because of rumble, killzone 2, Trophies, Price, online, and much more. But whatever 
And that's the only thing I need is *this*. I don't need this or this. Just this PS4... And this gaming PC. - The PS4 and the Gaming PC and that's all I need... And this Xbox 360. - The PS4, the Gaming PC, and the Xbox 360, and that's all I need... And these PS3's. - The PS4, and these PS3's, and the Gaming PC, and the Xbox 360... And this Nintendo DS. - The PS4, this Xbox 360, and the Gaming PC, and the PS3's, and that's all *I* need. And that's *all* I need too. I don't need one other thing, not one... I need this. - The Gaming PC and PS4, and Xbox 360, and thePS3's . Well what are you looking at? What do you think I'm some kind of a jerk or something! - And this. That's all I need.
Obligatory dick measuring Gaming Laptop Specs: Sager NP8270-GTX: 17.3" FULL HD (1920X1080) LED Matte LC, nVIDIA GeForce GTX 780M, Intel Core i7-4700MQ, 16GB (2x8GB) DDR3, 750GB SATA II 3GB/s 7,200 RPM Hard Drive
