What's a little shocking is that FFXIII would be unveiled before FFXII is even released outside Japan, but "rumblings" have apparently also been picked up that "Final Fantasy XIII is practically close to being finished" already. With all the delays to XII, it's certainly more than possible that a second team working on XIII's already got something to show by now.
It wasn't exactly surprising that FFXIII would show up as a PS3 exclusive--despite certain misquotes to the contrary--but you know that a new Final Fantasy is just what the next PlayStation needs (judging by how previews of FFX elevated the PS2's platform profile). Hopefully this little tidbit isn't EGM's way of stretching its April Fools' coverage to another issue (and another month).
[Thanks, Spatlase Disexia]