Yeah, but no. When it comes to these ultra compact units, used in the living room, heat = noise & failure.
Also, I believe Apple intends an eventual convergence between Mac Mini/Apple TV for cable tv replacement - thus the slow but steady drive to make the Mac Mini smaller......and to lock it down like a maximum security prison.
That would be stupid. They are 2 completely different products that have nothing to do with each other.
They could easily include Apple TV tech in the mini today if they wanted to. There's zero point in doing that though.