Totally agree.
I think 3D will be the next big thing, as soon as the price drops a little.
Like you said, Its been around now for over 25 years and, just like most other things eventually the price will start to drop.
I think now we have main technology things out of the way (Phones, PC's, TV's etc) people aren't working on these no more as the price is just too low and the market isn't as profitable as it used to be so they're searching for the next best thing.. 3D printing.
Think about it. 10 years ago you could get a camera phone for about £400.. Can get a phone with a camera now for less than £30!
So as soon as people start making cheap 3D printers the market will explode.
As for the rights for making a mobile phone case/screen etc.. I'm sure some companies will try to argue it, But we can get cheap 'knock offs' now on the internet, Theres just too much for the main companies to deal with.
If you look at some of the stuff that are out there that has actually been built with a 3D printer you'll be amazed.. as was I.
Another 5 years, EVERYBODY will have a 3D printer replacing their Epson printers