For me ,there is two possibility:
1.,The wii has the flipper.Nothing is changed, the nintendo miss a good oportunity.
2.They improved the chip,more effect,bigger speed ,stencil buffer,who now?
Second thing:timing
For the nintendo,the graphics side of the machine was not a first priority :the machine sell itself with the GC graphics capability right now.But in the future,the situation can change.
But , you want to keep the cost on a low level.How you can do this?
You have a comon resource pool(sdk developers and programmers+testers),and you have three area:
1, controller
2, network
3,graphics
The pripority is the same as above.
The 2.1 dekit isn't conatin any network code,and not conatin any graphics (except the gamecube gfx ).
The second thing that have to finish the network part of the sdk.The last is the graphics,because that will be an issue in 2008.
The 2.1 devkit is a gc devkit from graphics standpoint.The game development take 1 year at least , with the testings.After the 6th month , the new gfy implementationis nearly impossible.
For me this, and the 2.1 (2006/08/21) devkit mean that the first game (if the gfx devkit was released at oct-nov) that will utilise the wii gfx will released not earlyer than the midle of this year.
The Nintendo is not released any big name for it, except the zelda,but it was in box one year ago for the GC.Why?For me the answer is simple:to be able to do same gfx fine tuning .