Will Steam for Mac kick off an Apple gaming explosion?

Valve's superb Steam service finally launched for the Apple Mac this week, with the sublime Portal being the first title available for Mac gamers to try out for free.

Most importantly, Valve also plans to introduce its Steamworks suite of publishing and development tools to games developers, free of charge.

The developer is also now set to release its forthcoming games simultaneously on PC and Mac, (with Portal 2 being the next major release on the schedule).

Gamers and developers alike have been pondering the implications of Valve's announcement and what it might mean for the future of gaming on Apple laptops and desktops. Is this going to kick off a new, slightly-belated 'renaissance' in the Mac gaming scene?