1) Marketing: When you see a polar bear in a soda commercial, who is it? If you said Coke, you were siding with the bigger, more comercialized company. In truth, another company owns that trademark, Polar Beverages. Coke stole their trademark for their own commercials, and got into a nice legal crapfest over it. Oh, and Polar existed before Coke did. This applies to Bose as well....they are a rather "old" company (my dad still thinks Bose is great, since they were around since he was a kid...glad I kept him from buying one and made sure he bought some Sony ES floorstanders at a moving sale instead).
2) Wife Acceptance Factor: These are very small, and very unobtrusive speakers. Even their largest speaker, the 901, is at least "fashionable" in a way, so that the wife still does not mind it.
3) low quality sound makes it sound consistant: It's hard to find a "bad spot" for these speakers, and I have seen sellers use this as a marketing trick...pretty much the lack of deep bass and upper treble makes it so that the speaker doesn't get too harsh or too boomy when placed in poor locations.
4) Very effective displays. Their displays are designed specifcally to make these units stand out, and the music is very well matched to the product. I remember when i got kicked out of a wave music system demo (I reccomend going to these, the music smaplers they give you are nothing short of fantastic...plus the demo is pretty humorous in a sick way) for bringing in my "sudden death metalution" (my ex-girlfriend's brother's band...great stuff, but they sucked at naming themselves)...well the bass guitar alone on their CD made that system pretty much cry blood....this is why most Bose store displays won't allow you to change out the CD.
Pretty much, you are paying for an overpriced "lifestyle" product, like nakamichi or bang & Oleufsen.
It's like buying a GMC Denali for "luxury", when you could have bought a Cadillac instead.
Plus Bose cubes probably cost about $6-8 wach to make....for the "dual-cubes". Working in an electronic fab, I know how inexpensive some parts can be....trust me, a million+ dollar piece of hardware can be as cheap as 80k to build.....cheap is relative.
Either way, just try to sway the misguided in your life to the good stuff....don't worry abuot everyone else. My dad loves his ES floorstanders to death....despite how bad both our backs hurt from moving those heavy SOBs....I'm prety sure Sony put some dead bodies inside of each of those things as some kind of vibration damping or something....