Fax Machines.
Digital Cameras - my sister used to live in Hong Kong and came home on a visit with one. No I thought, they'll never catch on!! We still laugh about it today.
I suppose when edible underwear was launched in 1975 the sex angle went over my head- I assumed it was to save you having to wash them after you'd worn them.
plastic bumpers are rubbish, exactly as I predicted. Bend one and it costs zillions to repair. The whole idea of original metal bumbers was that you didn't have to repair the whole car.
I remember when we all had 'finger' indicators on cars, and then the flashing indicators were brought in. There was an awful fuss - people said we wouldn't be able to see them when the sun was out. That must be in the 50's I would think.
jno, i damaged the seal below the doors on one side of my car on a stupid kerb in an underground car park in france. when i looked at it, i realised that the seal and wings and side panels were all one piece - practically had to remove the side of the car to repair......and you don't want to know how much that cost.