True, but I doubt that they're anywhere near the price point of the Bose 2.1 setup they sell for PC use. For the price, I'd expect much much crappier performance out of paper, but the Bose delivers on clarity and has a pretty nice punch out of the sub. It isn't an "OMFG rattle the glass in your neighbor's kitchen" type of setup so it often gets dissed.
I'm not dissing Bose here. I'm agreeing that paper cones can sound great.
I'm no big Bose fan, but some of their low-mid range home speakers are pretty nice.