There are things that are very cool functionally but aren’t impressive to look at, and there are things that are cool to look at but not impressive functionally.
In the first category I think first of the Raspberry Pi single-board computer. There is a ton of potential in these little things, but you really have to know what it is and then think about what you can do with it to really appreciate that. To the eye, it’s just a very small circuit board, it doesn’t look particularly interesting, much less cool.
In the second category I think first of the prop-replica field, and especially the sort of stuff that Adam Savage turns out in Youtube videos. These look very, very cool, but it’s all skin-deep, the bottom line is that they may look and sound and even to some degree act as though it does something really interesting, but it’s all “a tale. Told by an idiot, full of sound and fury, Signifying nothing”. It’s basically a toy, a fake… and somehow that really isn’t cool at all.