I disagree.
They have to make the platform unique - maybe not necessarily the hardware. But that part is essential to the business model.
You sell it once on the console as a timed exclusive. You give it 6 months or a year, release it on the other consoles, get another big bump in sales. Then in another year or so you put it out on PC, another bump in sales... then in 3 or so more years, you re-release a remaster edition for yet another sales bump.
You have to have some distinction in the platforms - you don't want it to be PS3 level different at the hardware stage, but it has to be different enough that Joe Pirate can't get your Console edition just running on the PC without a significant amount of effort. And you don't want your console API to be identical to your competition's....