Gaming is a multi-billion dollar industry. Just look at Grand Theft Auto IV and how they sold 4 million units on launch day (est. $390 million). It won’t be a surprise if Apple will revisit the idea of entering the gaming market. They could do so in 3 fronts.
First, mobile gaming is still young with only a few players like Sony PSP and Nintedo DS dominating it. The iPhone and the iPod Touch is a good platform to introduce touch based gaming. Apple has already hinted that Electronic Arts (EA) and Sega will be developing for the iPhone. Nokia has already upped its ante with their new N-Gage platform so this is an area that will be closely watched by many.
Second, the console. It is possible that Apple could introduce gaming via consoles similar to the Apple TV. In a way, the Apple TV could be a potential interface to introduce gaming into millions of home it’s already installed. All they need to do is add some intuitive controller like the nanchuck on the Wii.
Last, the Mac. A number of PC games are already available on the Mac. You got Diablo, World of Warcraft, Neverwinter Nights and Star Wars: Knights of the Old Republic for example. Why not a lot of people are playing on the Mac may have to do with the upgradability of the system — can’t replace a new CPU or just slap in a much faster and newer video card. It’s also cheaper to set up from scratch a PC gaming rig than a Mac gaming rig.
Apple’s best bet would be in the iPhone and the iPod Touch.