The main point in the flipper is the embedded 24 mes 1t mem.
In the xbox2 you can see 10 megs similar frame buffer, and the speed of that is extreme.
Flipper has about 3 MB of embedded 1T-SRAM.
1 MB embedded texture memory, 2 MB embedded framebuffer
the total embedded 1T-SRAM memory is actually 3.12 MB
the 24 MB 1T-SRAM is external memory in GameCube.
in Wii, the 24 MB 1T-SRAM seems to be part of the Hollywood GPU package, but not actually embedded, almost certainly still external. it's not like Xbox360's 10 MB EDRAM daughter chip.
random thoughts, ramble:
lets assume that there is NOT much of an upgrade with Hollywood from Flipper. let us assume it is only a tweaked, somewhat beefed up Flipper combined with 50% more core clockspeed, making for a 2x increase overall over Flipper, and a few more effects/features, but nothing really significantly more powerful, and overall, just a bit more powerful than NV2A, the Xbox1's GPU. okay, then that means with WiiHD / Wii2 / Super Wii / whatever in 5 years, Nintendo games could get a MASSIVE upgrade in graphics by going with a fairly powerful GPU next time, even if not a cutting-edge one. That way, Nintendo can make it
seem like they've made an absolutely enourmous leap in graphics while going with a modest GPU for the time, a GPU thats more powerful than anything out today, even the highest end, but not highend for when the next Nintendo comes out.
Wii2 should be able to comfortably handle 1080p without comprimizes that Xbox 360 and PS3 have to make to hit that resolution. if Nintendo makes their HD games in 720p that's even better, since 3x more power will be there whatever the GPU is, since 1080p needs about 3x more performance over 720p. just give me a load of anti-aliasing and 3D motion blurr.
the GameCube and Wii both use narrow memory busses AFAIK with nothing being wider than 64-bit. i think they use a combination of 32-bit and 64-bit busses. not even 128-bit. Nintendo should go with 256-bit busses next time and continue to use embedded memory, but have embedded memory bandwidth greater than that of Xbox 360.
the G3-based CPUs used in GameCube and Wii (Gekko, Broadway) will have to be totally replaced with something modern. dual-core G6 or Power6 based. if not quad core. much less than what XCPU3 and Next-Gen CELL though. a GPU, again that's significantly more powerful than G80 and R600, but as I said, won't have to be near the absolute state of the art.