Er - i was researching the PS3 and how much of a joke it was years ago. The Cell Processor is a joke - its a single core cpu and the ppu's dont do floating point. The RSX graphics synthesizer is based on the original GeForce 7800 - i've got an 8800GT in my machine that'll mash it into the ground sideways.
The difference between the PS2 and the PS3 is that although the PS2 had DVD on it - there was only ONE AGREED STANDARD. The PS2 was cheaper than regular DVD players upon its release and had the added bonus of being a games console as well. There was nothing else other than DVD destined to replace VHS.
The cell is a pain in the arse to code for, the devkits are subpar compared to the xbox360.
Also i know full well how much space is required for HD content at 720p and 1080p - i have HD content already. 1.5gb to 2gb for 720p TV episodes or 6/8gb for movies (again in 720p). HDDVD = 15/30gb, Blu-Ray is 25/50gb. Already devs are saying there isnt enough data to fill a Blu-Ray disc unless you stick on a shitload of 1080p FMV. Even games like Crysis only take up a single DVD so far.
The games you've mentioned for the PS3 so far are 'meh' titles - hardly killer titles. They've all had pretty cack reviews - heavenly sword is certainly pretty crappy.
And this is the point, until all those titles for the PS3 are ACTUALLY OUT - theres little point in pissing your money down a drain on it. Tekken and FFXIII are hardly revolutionary games - just prettier versions of the same shit thats gone before...
GT5 is the ONLY title thats worth bothering with.
Xbox360 has Army of Two, DeadSpace, Crysis all coming out for it. Oh, and the Orange Box is already out for it
Oh and it currently has Call of Duty 2, Call of Duty 3, Call of Duty 4, Gears of War, Halo 3, Quake IV, Forza Motorsport II - plenty of pre-existing 'KILLER TITLES' that people ACTUALLY WANT.
Why bother with a PS3 when you can get both an Xbox360 and a Wii for the same price, and DO more on it?