Originally Posted by
DJZen
Think about this. If a DS cart is 4.5 gigs, that's the equivalent of 6 CDs. However, that's a fallacy. DS cards only store 1GB. This is just under 1.5 CDs. Basically you'd need two DS cards for FFVII alone. Now, while you might assume this gives the PSP the edge with its ub4rl337 0pt1c4l dr1v3 p0w4rz, it's not much of an edge. The UMD format is only capable of storing 1.8GB, which is roughly 2.5 CDs, meaning you'd still need 2 UMDs for a game like FFVII.
Long story short, don't hold your breath for the PS games to be released on portable format. I'm sure it'll happen, just not soon. Possibly not until the next generation of handhelds.