Uhhhh, Skies of Arcadia came out way after FF7, 8, and 9. Therefore CG cutscenes were old news by the time the game released. The lack of CG probably had more to do with the fact that the Dreamcast was such a graphical powerhouse at the time that the directors of SoA never felt the need to use CG to make the game look impressive. The in-game graphics were impressive on their own.
As for the original topic, if it's true I would definitely have to get a Wii. The thing is, as others have said, Sega has already built a great engine for SoA that's being used in Valkyria Chronicles for the PS3. The team that made Valkyria Chronicles are already intimately familiar with the PS3. Why would they just abandon all that knowledge and capital investment to make a Wii exclusive?
My Top 5:
Shadow of the Colossus, Metal Gear Solid 3, Shenmue, Skies of Arcadia, Chrono Trigger
My 2 nex-gen systems: PS3 
and Wii 
Prediction Aug '08: We see the PSP2 released fall '09. Graphically, it's basically the same as the current system. UMD drive ditched and replaced by 4-8gb on board flash memory. Other upgrades: 2nd analog nub, touchscreen, blutooth, motion sensor. Design: Flip-style or slider. Size: Think Iphone. Cost: $199. Will be profitable on day 1.
