I agree that all 4 things listed are diminishing, but I really think it's an overstatement to say they'll all be gone completely. The email contains a couple factual errors, also.

1. CASH MONEY - It's been true for a long time that the majority of American money doesn't exist as cash, and most of what does isn't in America.
http://money.howstuffworks.com/how-m...-the-world.htm
But until all the WORLD's transactions are computerized, there will be a need for cash money, and I wouldn't say that will EVER happen. And there aren't "trillions of dollars" worth of pennies in existence, in fact not even a trillion dollars worth of American money exists as cash, in total. One trillion dollars in pennies would be over $3,300.00, or 330,000 pennies, for every man, woman and child in America.

2. "The Post Office will go out of business" - This one might happen, or it might just cease to exist in its present form. But there will always be a need for snail mail. If the USPS isn't delivering it, then maybe UPS or some other private carrier will.

3. "Paper Newspapers and books, along with music, videos, movies and other entertainment. Like bill paying, the younger generation is used to doing everything on-line, including gettihg news, streaming videos, movies, etc. and these things will go by the wayside."

I don't think all of these should be lumped together. Paper newspapers? Yes they're disappearing, more's the pity. A lot of them have gone out of business, and just look how emaciated the Courier-Journal looks these days. But then to go on and say, "music, videos, movies and other entertainment." are going to by the wayside? OK you may not see CD's and DVD's, just like you don't see 75's and daguerreotypes today, but people are always going to want to have their own collections of music, videos, movies, etc, that they can access at will, which means there will always be a demand for some kind of durable media to save stuff on. It'll just look different than it does today.

4. "Landline Telphones are being used less and less all the time. The last time I saw something about this, it said that less then half of the homes in American have landline telephones and those were for "older people". The younger people are used to instant communication and want to use their cellphones for everything."

True, they're being used less and less, but it's about a quarter of homes that DON'T have landlines, not less than half that DO. And there will always be areas that you just can't get cell phone service, unless they all go satellite. Plus businesses need to keep them around for when they're VOIP systems go down. Landlines aren't going way completely any time soon. It was only a few years ago that the last place in America even got push-button phones!