10 game changing tech ideas that failed

Thinking back on recent “game-changing” tech ideas, I notice a trend. Most of the game changers weren’t new inventions, but rather improvement on existing concepts. Take the iPod for example: Apple didn’t invent the mp3 player, but they did make the mp3 player better.

I thought about that while reading an interesting article on Techradar.com entitled, “10 game-changing tech ideas that didn't change the game.” Sure, maybe these ideas failed initially, but could any of them succeed with a few improvements? The tablet PC stands out to me as a possibility.

What do you think?