wtf....seriously, they are porting FFX before remaking ff7
Porting can be done fairly cheap. A few 2D assets will need remade so as not to look bad (mostly UI stuff like fonts), and some cutscenes will need re-prerendered, but this is a great way to make them money, and to make the game available to a not-insignificant number of gamers who simply don't own a PS2. FF7 is already available to PS3/PSP owners in the form of a PSN download, so is not in nearly as great need of a port.
A full-on remake (of ff7 or of any game), on the other hand, would cost quite a bit of money, take quite a bit of time, and would require entirely
new assets. Not to mention, they stand a much greater risk of alienating their customer base, by making it too much like the original (which would anger people who want to see the game work with the retcons from later materials) or not enough like the original (which would anger people who don't want to see a classic tampered with).
From a business perspective, this makes more sense. That's not to say they'll NEVER remake ff7, but it would be foolish to put that kind of investment into something that they could possibly screw up and would divert resources from other major projects, without first exhausting cheaper, easier sources of income.