You sure like to have "freaky" thread titles...
You know what? Dont get too caught up about it. The "problem", perse, really isnt that big. I beleive strongly in fact its not a problem at all. Several factors are at work here. The biggest one, is ignorance.
IG-NOR-ANCE.
Many people assume "cartridge" versus disc, and say "oh gawd, PS vs N64 all over again". They dont realize just how much has changed...for one, these are NOT you old school carts used in the SNES, N64, even the GBA. These are "flash-card" like high-tech solid state data cards...far cheaper AND faster to produce than our old skool carts ever were....and it may come that they involve rewritable sectors, just like Nintendo planned to have with the 64DD discs (gawd, that tech was inferior tho).
Already they are coming in flavors of 128 MB...there is no doubt 256 is right around that corner....and that is a lot of memory to make a beautiful game. How large did N64 games get (the closest approximation of the DS hardware)...the answer is 64 MB achieved by Resident Evil 2....our classic Ocarina of Time itself was on a 32-48 MB cart. Mario 64? 8-16 MB. How large was Aria of Sorrow for the GBA? Metroid Zero Mission? Mario and Luigi? Maybe 32 MB... Those figures are just for perspective.
What the DS cards will not be great for are high quality movies and streaming, pre-orchestrated audio. Resolution of texture art should not be a big problem...given the screen type of the DS.
Where else does ignorance come into play? Allowance for the portable market...a disc drive is fine technology (and Sony has plenty out there), but the best bet for a PORTABLE MOBILE gaming system? We'll see about that, but my early opinion is very skeptical. Solid state media on the other hand has proven suitably tiny AND hardy AND fast access. Load times on a portable machine? I shudder at that possibility...
At any rate, I personally dont want to ever bother with "multiple disc or card" games when Im playing a portable system. That notion just annoys the heck outta me...and really, it should never have to come to that.