Mac should concentrate more in the smart phone business because in the gaming arena they are the laughing livestock of the world.
"Mac"'s don't exist anymore (PowerPC architecture), they're Intel architecture hardware, like any other laptop, so it comes down only to the operative system now.
Yes, unfortunately the graphic card options svck, i have a MBP 2010 2,40 Mhz which comes with a Nvidia 330m 256mb, a medium end laptop offer, but anyway i've spent countless hours of fun playing games on OSX, like TF2, Starcraft 2, Doom3, Quake 4, Eve Online, Warcraft (3/Wow) and many more.
The gaming ecosystem could and should be vastly improved but i hardly doubt it's the "laughing livestock of the world".