The 20th of may is the tenth birthday of PS1, and it will probably go F2P (who knows), there will also be an event organized by PS1 veterans, the Planetside Day!
According to what Higby said, it will also be available to PS2 subbers, probably before that date.
I took those screenshots in game, at 1920x1080 resolution with 4xAA, the game runs at 200+ fps.
Just wanted to let you know, you might be interested in trying it .