I think many of the things we are familiar with would be obscure, unheard of, and odd to most people. Look at what this forum is about, and where those things came from. Most mainstream gamers would not know about most of these things. Depending on their age, even some things that were widely marketed (in the US, at least) and in many stores, such as the N-Gage. I don't think I have ever personally seen a TurboExpress in the wild (and I still really want one after all this time). The N-Gage supposedly sold around 3 million units, while the TurboExpress sold about half that. I have no clue how many Zodiacs sold, and I don't think I have personally seen one of them in person either. Then there are tons of other handhelds that didn't sell so well (yet we have emus for them that were ported to the Pandora), and all the stuff coming out of China. My guess is some computers, especially some older ones would be the same. There might be some consoles out there as well. I want to mention Dendy, but which one? Plenty of other clones are out there as well, and there are a couple that I hope to add to my collection eventually, although I can't remember names right now. There are many electronic devices from the Soviet Union I find interesting, mainly because I never had access to them, and some look (and sound, since some are synthesizers) different than what I am used to.
A lot of the things Nintendo makes are a bit odd, even if they are a bit like other things that are out there, and are eventually copied. The N64 controller, Wii Remote, Wii U Gamepad, DS and 3DS are some examples. I even remember thinking the GBA SP was a bit odd when it came out...brilliant, but odd (that you folded it in half).
