Calling people imbecile is not much correct when it comes to behavior towards branded objects, remember your early teenage times. In this case people mostly care for a brand, and I believe, the logo is what matters the most, not resemblance. Mobile devices are closer to the realm of fashion mainly because when you are outside, when you hold it, and when you put it on a table you want people to see the logo. Au contraire, desktops are usually at home or workplace or even hidden beneath your table, and they are less of a fashion object.
A good example for mobile devices would be the jeans, bags, sun glasses etc. Where resemblance to fashionable brand matters however the logo or tag matters the most.
All that said, I am fine with my Rasberry PI and Linux.