Personally, I think portable video players are practically useless too:
-The screen is too small to watch something in quality color and graphics
-It costs too much just to take it somewhere to watch something on a tiny screen
-Television is better because it costs less (well some may cost more) but you get a better quality picture
So I think they aren't much of a good use.
Cell phones, however, do have good purposes. You can use themin the case of an emergency, find people, and call anyone from anywhere. I think that's quite useful. So there's my opinion. :davidblaine: