Judging from the graphics and gameplay of Wipeout Pure, I was (erroneously) under the assumption that these games take up a good portion of the 1.8 GB UMD. I was wondering how we would be able to cart around multiple game backups without buying multiple memory sticks (or waiting for a way to hook up some sort of mass storage like a HDD). It's great to see that we will be able to probably fit 5–10 whole games onto a 2 GB memory stick, and we won't have to sacrifice too much portability.
I'm sure there will be some games that do take up most of the 1.8 GB UMD, but hopefully PSP games will be like PS2 games and average around 50% of the size of the disc they're stored on. Maybe we'll even get lucky and there will be dummy or unnecessary files we could rip out of the images!
Yes. The small size of that was a pleasant surprise to me as well.