Game Prices: I'd say it's about the same all around, except with the 360 having a slight advantage since a lot of its library is older (due to it launching a year earlier than the PS3 and Wii).
Development Costs: Man, did you make these costs up or what? Mind actually providing a source?
Porting Difficulties: Most of the best selling and critically acclaimed multiplatforms of this generation have been on the PS3 anyways. It doesn't matter.
Hardware Costs: So......not a problem then?
Classics Online: The market for retro games isn't that humongous or important anyways. A nice bonus, but nothing to fret about.
Online Network: A lot of the advantages that Xbox Live has are things that I'll always felt are pointless. But ehh, whatever...
Blu-ray: I'd say the format actually helped the PS3 early on (when it was one of the cheapest players), and it should continue to help it for the rest of this gen.
Motion Controller: They'll still be nowhere near competing with Nintendo.
There's a reason big companies generally don't skip generations. It's not a smart idea. It may sound good to you, but what happens when all the interest is on the Wii 2 and the Nextbox? Sony's PS3 won't look very appealing at all.