There are many reasons why this system is better to start off is a list of games.

Exclusive Games: Fable 2 (by Peter Molineux, great game designer of Populous and Dungeon Master). Gears of War 2 The Halo series (can you name a PS3 game, that over 50% of PS3 owners got?) Lost Oddisey (a game by the Final Fantasy producers). Blue Dragon (a game by the producers of Dragon Quest on the PS2) Mass Effect. Exclusive downloadable content on the Xbox 360 for GTA IV (rumored to be as komplex as Vice City or San Adreas were "addons" to GTA III) The PS3's exlusives are: Killzone (standard First Person Shooter), Gran Tourismo (about the same as Forza Motorsport on the Xbox 360), Riiiiiiiiiiiidge Raceeeeer (how often are they trying to sell the same game?) Multimedia features: On the Xbox go to the music player. Load your favourite music. Be it from USB, or via Network or the harddisc. Now start a game. Notice something? You can replace the game's music with your own, and the Xbox will keep the sound intact, so you still know what's going on in the game with your own music. Community: When you want to read a message or tell your friend something on the PS3, you must leave the game, and check your messages, or you must make sure your buddy is in the same game as you. On the Xbox you pull up the Guide blade at anytime, no matter what you do, and chat to your friend. You can even contact people on MSN Messenger on the PC. Hardware: While the PS3 is good at decoding BluRay Movies and folding proteins thanks to the 7 DSPs on the Cell chip, the language used to talk to these processors is seldom used in games. The DSP's can only do floating point arithmetics well. Games however are 80-90% integer calculations and decision branches, wich are best handled by a general purpose CPU with a large Cache and branch predictor. The Xbox has 3 of those, the PS3 only one. Furthermore: Memory Bandwith. The PS3 has about 50GB/sec of memory bandwith to the framebuffer. If you take a basic 3D image calculation for a HD image, you need to do Z-Sorting (wich object is behind another) and color shading (so the objects seem solid). This already takes up almost 60GB/sec for a HD image. Therefore the PS3 has to compress the data first to get around that bottleneck. The Xbox 360 has over 270GB/sec of memory bandwith, allowing it to do not only color shading and Z-Sorting (even with transparent objects) but also Full-Screen Anti Aliasing and High Dynamic Range rendering in one pass. To see the difference for this, you just have to look at Madden 08. A game that runs at only 30FPS on the PS3, but full 60FPS on the Xbox 360. Or take the comparison shot below for the game Turok. Sales charts: It's easy for the PS3 to overtake the Xbox 360 in sales now. The Xbox has a one year head start compared to the PS3. Over 18 Million people own a Xbox 360 already. So the market of gamers wanting a Xbox is beginning to saturate. Therefore the PS3 still has a lot of work to do to keep up with the Xbox 360.