I can see alot of threads on PSX games, you seam to see the PSX as the PlayStation One (PSone)
Well, here are some facts. ;)
PSX is the name of a Sony media center, digital video recorder, and DVD recorder based on the PlayStation 2 video game console. Since it was designed to be a general-function audiovisual device, it was marketed by the main Sony Corporation (whereas Sony Computer Entertainment markets the corporation's specific game-related hardware). It was released in Japan on December 13, 2003. There were plans to release it in other territories in 2004, but in 2005 these plans were postponed indefinitely due to poor sales.
The PSX features either a 160 GB or 250 GB hard drive to record television shows, home movies, digital photos, or to play PlayStation 2 titles (including those requiring the PlayStation 2 Hard Disk Drive). The PSX can be linked with the portable PSP device to transfer videos and music. There is also the indication that the PSX will be linked with the PlayStation 3, meaning that existing PSX owners will not be left out. This could possibly mean that the base version of the PS3 would connect to the PSX to form the “home server” version of the PS3.
The PSX is also known for its introduction of Sony's Cross Media Bar (XMB) interface.
PSX is also a popular nickname for the original PlayStation video games console. The "X" appears because Sony originally developed the PlayStation as a CD-ROM and SNES hybrid unit. When the project was halted by Nintendo, Sony decided to redesign the PlayStation as a stand alone console, which was known internally as the PlayStation Experimental.  The media caught wind of the name and it has stuck ever since. The PSX label understandably causes much confusion, as in many contexts it is difficult to differentiate between the PSX media center and PSX video game console.
As you can see, the PSX was going to be for PlayStation One, but was released a year after PlayStation 2, it was HD and had a few features that the PS3 has.
Unfortunatly the PSX was only released on Japan and is forbiden by import laws to be exported out of Japan.
The PSX played PS2 games and PSone games.
Your though's please :)