theres a lot of ignorant kiddies in this forum lately who are biased towards one platform.
its like holdens vs fords.
there is also a lot of games on the mac you cant play on the pc, unless emulated.
OPENGL 3d games run a lot faster then Direct X games, thats why I kick ass in many FPS style games using a g5. try opengl on your pc one day and check out your fps scores.
There is a free wolfenstein multiplayer port for free on the mac and pc, as well as many other games.
depending on what kind of game you like, you will have to decide.
have you tried ev nova by ambrosia for a space game, its fun.
http://www.ambrosiasw.com/games/
I still play diablo II and warcraft III on the mac sometimes.
I have Dragons Lair and space ace for the mac which are brilliant games from eons ago.
try google its not that hard.
http://www.google.com.au/search?hl=en&q=mac+games&btnG=Google+Search&meta=
http://www.google.com.au/search?hl=en&safe=off&q=free+mac+games&btnG=Search&meta=
OS X runs faster with INTEL based chipsets and has done since the inception of OSX to the mac platform. Apple had been compiling it on PC architecture for years.
Core Image features out now built into the framework of mac os x could easily help create your own mini photoshop its just that the refinement of fifteen years shop has cant be caught up with in many areas.
http://arstechnica.com/reviews/os/macosx-10.4.ars/15
Most of the features in OS x are not hardware dependent anymore as they have layered subset components which allow you to build on top of them regardless of your architecture below. photoshop's binary issue is a pain yes for intel macs.
Since most programs coming out now in graphic intensive areas for the mac are using Quartz extreme components ( Using your GPU instead of your CPU to runt he windows environment). This basically opens the doorway to REALTIME goodies for sound image and video.
have you seen the quartz and core featured packages for free on the mac.?
imagetricks
pixelshox
live quartz
you can play many game on the g4, depending on its video card for the higher end games.
nicely done to score a g4 btw, I have a g4 800 with 1.5 gigs of ram and a BlueATI sapphire with 300 gigs of space.
If no-one gives your an answer to a question you have asked, consider:- Is your question clear.- Did you ask nicely.- Are you showing any effort to solve the problem yourself 