The Thing your missing is, only the improved things go noticed. Of course people want better TV's, Stereo's and Computers. But that doesnt mean to say nothing new was invented. It just goes un-noticed next to the things we call everyday items now. 50 years from now People may be using things that just got thought up ths year, or were only invented on a small scale in one country. Noone knows.

But new things are constantly being invented, and constantly being improved, and those things will become a world standard Just like Television and Radio.

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