That's BS. Having recently bought a new Dyson Vacuum cleaner, I'm still surprised just how well thought out, well put together it is. The attachment that uses the suction to spin round a brush for cleaning stairs/cars is impressive enough - the roller brush spins fast, but it still sucks up everything. Let alone all the other unique features. There simply isn't another manufacturer close (Even though they try to copy every feature).
Just because something also looks beautiful, don't assume that's the only reason it's successful. (Also see Apple).