Carmack is not saying PCs are inferior, he is basically just using carefully plotted and deceitful words to say that developing games for consoles earns you the big bucks.
I don't care what anyone says, PCs are the best for me right now, consoles don't have the kind of games that made me rush to buy them, it's all shooters now and I'll be damned if I'm seen playing a shooter on an analog stick (seriously, I don't understand why shooters are so popular on consoles) and to top it off, PCs support the 360 controller, games like DMC4 and GRID support it right out of the box. Seriously, how can you play shooters with a gamepad? I'm not being picky, I have enjoyed shooters on a gamepad before (TimeSplitters 2, PS2) but you lose so much precision it's not so fun, you need all these aids like auto-aim, it's ridiculous even, it'd be like playing Warcraft III with a one-button mouse and no keyboard, I can't imagine how amazing TimeSplitter 2 would be if it was ported to the PC.
Not to mention a huge amount of awesome games are coming out this year, the only console I have my eye on is the Wii because it's not all shooters and stuff, the games on that console have remained "console" and not trying to be some PC game wannabees.
Some of the best games ever are on the PS2, that's because developers stuck to what the PS2 did best instead of trying to make the PS2 an accessible PC.
Nowadays, PCs are even cheaper and offer better experiences (framerate, graphics, modding, etc), I'm loving PC gaming like I always have but now I'm starting to shy away from console gaming simply because it's trying to be a PC TOO much, way too many shooters and even RTS are trying to hit the consoles (Command & Conquer 3 on the 360 is a big fat joke) and there's such a big emphasis on graphics when consoles are always going to be outdated on the graphics front.
I miss the PS2 days, when I played my PC and my PS2 and I actually played different games on both.
If you ask me, it's all Microsoft's fault and their "precious" Halo, they brought FPS to consoles and ruined both the genre and consoles in the process.