But it actually is, Unlimited Detail, in multiple ways.
Why do you say that claim is wrong or not the correct suitable word for it?
Unlimited means without limit. As in, you can have as much detail as you want, and nothing stops you from adding more.
Obviously storage is a limit, common sense says that they can only fit a finite (limited) amount of detail on any disk.
They never make any specific claims about their compression ratios, for example. However, when asked this in an interview, what the limits actually were with regards to scene complexity, he actually stuck to his guns and claimed there were no limits, which is akin to saying he's invented infinite compression... just silly. Even saying something like "obviously computers are finite, but it may as well be unlimited because we can easily fit an entire micro-detailed city into a gigabyte of storage", etc, etc, would be ok, because then it's a real claim, and not this exaggerated nonsense.
The actual statement I'm quoting here is:
Interviewer: People were claiming that you must have some sort of memory limitations?
Bruce Dell: Umm. No. The simple answer is: no.
Interviewer: You say the technology has unlimited power?
Bruce Dell: Umm, yes, yes we do.
Those kind of stupid statements are why I make fun of him, saying he's claiming ∞:1 compression and O(1) search...
To be fair, they could have a search based on perfect hashing, which would allow for constant time rendering of any size scene, and they could have really-damn-good-compression... but that's not "unlimited".