I'll admit to the ultimate laptop-speaker sin, just to get us started: The first time I heard Pet Sounds, I was playing 128 kbps files from the iTunes Store (back when they were DRM'd) on my Powerbook G4.
I loved it, luckily. But if you're wondering how much nuance 2005-era laptop speakers can transmit, try listening to "I Just Wasn't Made for These Times" with your hands over your speakers, or with your headphones a few inches away from your ears. (Or on your 2005-era laptop, I guess.)
It's not a great experience. But the real problem comes when the album in question isn't a canonical rock classic with a fascinating backstory. What happens when your first listen of a really-pretty-good album is on your laptop, while you're reading Buzzfeed and trying to get some work done?
I had this problem most recently with Modern Vampires of the City, Vampire Weekend's third -- and most sedate, least immediate -- album; after a few listens I found myself a little bored by anything that wasn't "Diane Young."
But those few listens had all come while I was in my office, via a pair of earbuds that I may or may not have gotten from the magazine pocket of a Frontier Airlines plane.
It's important to maintain some perspective here -- arguments about the sound qualities of vinyl aside, in terms of sound fidelity we're way ahead of the setups with which most of the classics were originally heard. We're not using AM radio or Geo Metro cassette decks.
But that leads us to the other thing that's dangerous about computer speakers: Just how easy it is to play any song you want on them.