Legendary game designer, Id's John Carmack, stated recently in a Gamasutra interview that World of Warcraft is an "insanely successful product" that's like a "train driving all the PC sales numbers". Carmack and spouse Anna Kang also discussed the newly launched Id Mobile and the gaming scene overall:

What do you think the state of PC gaming is right now? Is PC gaming as its own entity fading away in favor of it being just another platform option for console titles?

JC: It's definitely true that when you set out to make a new game now, you do wind up looking at the PC as it sits next to the console, and that drives design conditions...

...Historically, the real value of PC has been in connectivity, and in modification... but the latest generation of consoles is encroaching on that territory with all the options you've got on current consoles, the connectivity and the add-ons and things you can get there.

But on the other hand, if you look at what's really successful on the PC -- like World Of Warcraft, that's an insanely successful product. It's like a train driving all the PC sales numbers altogether on gaming.

Just in terms of games that you sit down and play in the console mode, the PC probably doesn't have a huge amount of differentiation, and that's unlikely to change.

But the different areas where the PC is still standing on its own is MMOs, and a lot of casual games are interesting, too. The people that sit down to play games are predominantly playing them on consoles -- at least, higher-end games -- but the PC still has a strong enough margin to make games, and we continue to support it.