I'm not saying he doesn't know what he's talking about, he just never liked consoles, he was always a PC guy and if he were truly "excited" about the nextgen that's like hearing Armstrong will quit riding bikes and be a F1 pilot.
And I'm saying, your opinion is stuck in the 1990's. John Carmack was very excited about both the xbox 360 and the Nintendo Wii. He's just not excited about the next generation because, in comparison to the most recent generation, he believes we're at diminishing returns for having more and more powerful 3d graphics. Which is exactly why he's taking VR headset development into his own hands.