Part of it is that the Wii just isn't powerful enough to handle it. First, the CPU is a single-core unit running at around 729 MHz from what I've read, which is good for 2.9 GFLOPS. The PS3 has a 3.2 GHz processor which has seven operational cores, each one of which is good for an estimated 25.6 GFLOPS. So each of those seven cores has almost ten times the computational power of the Wii.
Then there's the issue of graphics. The Wii has an ATI-based 243 MHz graphics chipset, and the PS3 has a NIVIDIA G7800-based setup with 256 meg at 700 MHz, capable of something like 200 GFLOPS for 3D operations. It'd have to be powerful to drive graphics at 1080p. I did the math (roughly) and the PS3 has 5.7 times as many pixels to contend with at 1080p than the Wii does at 480p.
All my figures above are rough and brief; to read more about it, check out Wikipedia, where I got most of the info.
I think the Wii can do a lot; it will depend greatly on how much effort developers will put into it. The Wii has (I think) 64 meg of RAM compared to the PS3's 256 (they call it 512 but it's 256 system / 256 graphics), so from a coding standpoint, there's more work to keep things moving efficiently when you don't have much memory to work with. Anybody remember the Atari 2600? Remember how good the graphics were on most Activision games, compared to the regular Atari games? Better programming. The games themselves weren't that great, but they looked pretty. I spoke to a guy who used to write for the 2600 (ages ago) and he said the actual screen resolution the 2600 could produce was "192 pixels by the speed of your code." I think that applies today too.
Man, I'm really showing my age here...
Rob
Then there's the issue of graphics. The Wii has an ATI-based 243 MHz graphics chipset, and the PS3 has a NIVIDIA G7800-based setup with 256 meg at 700 MHz, capable of something like 200 GFLOPS for 3D operations. It'd have to be powerful to drive graphics at 1080p. I did the math (roughly) and the PS3 has 5.7 times as many pixels to contend with at 1080p than the Wii does at 480p.
All my figures above are rough and brief; to read more about it, check out Wikipedia, where I got most of the info.
I think the Wii can do a lot; it will depend greatly on how much effort developers will put into it. The Wii has (I think) 64 meg of RAM compared to the PS3's 256 (they call it 512 but it's 256 system / 256 graphics), so from a coding standpoint, there's more work to keep things moving efficiently when you don't have much memory to work with. Anybody remember the Atari 2600? Remember how good the graphics were on most Activision games, compared to the regular Atari games? Better programming. The games themselves weren't that great, but they looked pretty. I spoke to a guy who used to write for the 2600 (ages ago) and he said the actual screen resolution the 2600 could produce was "192 pixels by the speed of your code." I think that applies today too.
Man, I'm really showing my age here...
Rob