So in zwift we get wheels and bikes to go faster, what about new brakes (maybe a regular and disc) groupsets (shimano, campagnolo) or handlebar material (aluminum, carbon fibre). Also, what about different color bars tape (wouldn’t affect speed).
No, no, bar tape colour definitely affects speed - at least as much as groupset. 
Well red is faster than green…
Not in a sprint
But on Epic KOM everything is diffrent