Its actually probably better to just get a bundle. I was looking at used since mine broke this past month and a brand new ps3 with the uncharted bundle was just $20 more expensive than a comparable used one.
that being said, the disc tray is WAY different and all it takes is a good nudge against the console and the disc tray cover opened up.
i don't think much of what you said would really affect popularity (except for the Blu ray part). Graphically they are not too far apart, and online play is debatable.
What you need to look at is the social aspects of gaming.
xbox released earlier and cheaper, so ppl wanted to upgrade to the next gen asap, so some market goes there. People at the time were looking for the most affordable console and then once people got it, their friends would get the same system so as to play with each other . Also consider the achievements(giving some form of Skill to show off) and the strong party support for xbox when wondering why xbox "won" this generations console war (not considering Wii)
I own both consoles. I'll admit that the 360 has a number of exclusives, my point was that I don't find them as interesting or fun as PS3 exclusives. I still get a number of cross platform games for the 360.
Forza? Grant Turismo is better. Gears of War? Killzone is better. The South Park game is also on PC and has yet to be released, the Fable series has gone down hill. The last PGR game was released in 2007 and the series doesn't have a clear future, and imo Gran Turismo is better. Dead Rising was a good game but I would be lying if I said i ever played the last two.
PS3 has Little Big Planet, Uncharted, Ratchet & Clank, Metal Gear Solid, God of War, Gran Turismo, Twisted Metal, inFamous, 3D dot game heroes, MLB: The Show, Killzone, and Resistance to name the ones that come to mind.
That's not mentioning other series that I haven't even looked at like Whiteknight and Yakuza that my friends say are quite good, as do reviews. And forget the excellent non-series exclusives like Heavy Rain. All the 360 has to answer that is Alan Wake, which wasn't even close to being on the same level imo. The Last of Us, Beyond: Two Souls, and The Last Guardian are all in development exclusively for the PS3. Excuse me if I'm a little more excited for those games than was for "Fable: The Journey."
You could pretty much knock MGS off that list at this point unless MGS5 wants to change that. I own both 360 and Ps3 and play both just as much they both have their strengths and weaknesses, no need to argue. I would agree Forza>GT5 though but I really liked Heavy Rain.
Forza is superior? Better controls? I'm pretty sure the wheel and gas peddle setup is not a whole lot different. Technical as in physics? I thought it was a toss up. I see both as sims but I feel GT is more true to that label. I always felt Forza was a pick up and play sim where GT was more in depth.
I am likely showing bias because I have been playing GT since the first and Forza since the third (not horizon).
I like the PlayStation. The PlayStation 2 was my first console ever and than I got the PlayStation 3 and I like it, I don't really play that many exclusive games for it besides Uncharted, InFamous, God of War, The Last of Us when it comes out, most of the games I do play are for both, look the PlayStation and XBox are both great consoles I just haven't played XBox as much as the PlayStation and yeah both of them have their flaws and their successes but its just as it is in the world of video games.