Its apparently a great game. Its getting rave reviews. So its a big deal for mac to get an a-list game.
To answer your question, anyone that is a star wars fan or anyone that likes high quality games. Which, last I heard, means a lot of people.
The bigger question is when is it coming out for Mac? Though I'm all for more games on mac, I have to say that I'll probably be finished playing the ps2 version by the time the mac version is released...
The PC version is only $29 so the Mac version will be the same. The console version is $39 but it's still an ok price. This game is wonderful. I downloaded the demo and played it on my PC and it played like a dream.
After you complete a level you have a 'free-play' mode where you can change into different characters and walk around. It's fun being an enemy droid and sneaking past the bad guys without them knowing.
If you haven't seen screenshots or the trailer for the game I say you should look at them before you judge the game itself. At first I didn't know what to think, but after looking at the screenshots and videos I downloaded the demo right away! Heck I even submitted this story and reserved a copy of the game myself!