I should state that the reason I'm 100% positive that Nintendo will be using "carts" for their next console (be they holographic data cards or ÂĂĽber SD Cards) is because of this whole "disruption" kick Nintendo's been on. They've successfully steered this generation to be more about interface than more powerful hardware, for example.
So why not attempt to change the values of the next gen by making the game's media more about access speed and reliability than capacity? It's something nobody is really thinking about right now. Everybody's all starry eyed about a 75 GB Triple Layered Blu-Ray Disc or some kind of 2 TB Hard Drive for all this talk of future-proof Digital Distribution, when nobody wants to talk about the DREs and the scratched disks and the drive failures and the "you rent this from our servers, you don't actually own it" issues that go with them. I can't be the only guy that sees the DS's loading times and compares them to MGS4's 8 minute "installs" and wonder why the hell we're getting cheated on this front just because the Playstation won the Console War more than a decade ago. I can't be the only guy who's had 2 PS1's break, had a PS2 break, and has had several computer failures, but also had an NES that still works, an SNES that still works, an N64 that still works, and every permutation of gameboy and DS work fine to this day, and noticed that the problems are with moving parts, spinning motors, and easily damaged media.
End the Disc! Carts now! Carts forever!