You might like Larry Nivens Known Space books (such as Ringworld, among many others) as it’s hyperspace makes most people’s minds freak out. Very few people are capable of looking out a window in hyperspace and not going at least a little bit loopy.
It’s also implied that Things live in the gravity wells and that’s why you need to be far enough away before you make the jump but this isn’t really developed much.
These exist in smartwatches. Not reading your brain activity but tracking your micro movements (or macro) and vibrating on your wrist when you are in a lighter stage of sleep around your alarm time.
I was in Japan buying a souvenir for my mom. I had settled on a really nice hanging wall scroll with a landscape view. The salesman packages it up, and I realise that this is going into checked baggage on my flight home and is kind of fragile. I mention this and the guy goes and digs up all sorts of additional packaging, bubble wrap, and twine and ties it up so securely that he cut his fingers on the twine. The man injured himself so that I could get his product safely into an airplane.
That was 19 years ago, and I will never be in that shop again, but I will also never forget that.
Ultima V
I have several Tiles. Beyond helping to find where I’ve misplaced something in the house, I managed to lose my wallet once. I flagged it as missing on Tile and started waiting. I didn’t have any high expectations as it was the dead of Canadian winter and I expected the battery to have died completely out in the cold but no I got a ping a couple days later. A short search in the area and we found it.
I have also put tiles on my bicycles and luggage in case they ever get stolen but so far this has never happened.