If you like being able to play on big screen TV, you can still have that no problem.

You can hook up computers to big screen TVs with HDMI.

Then use any of the available programs to connect a PS3 controller to your computer's bluetooth.

Map the PS3 controller's buttons to be the same as normal ffxi controls, and boom you can still play ffxi just like its PS2. Except you can make it prettier and nicer looking by configuring your rendering settings via SE's config menu in the game.

As for porting to PS3: I'm pretty sure SE still needs a ps2 devkit for this.