Except as a tool of mischief, this type of laser isn't that useful. Think it through:
. Laser display - not so good, as you'd have to mount it behind some scanners, etc. and the beam probably isn't that great in quality.
. Laser pointer - not so good either, unless you want to point out things pretty far away. Perhaps as an astronomy pointer, but green works just as fine here at much lower powers.
. Cat toy - no, unless you like blind cats
. Cutting tool - not nearly enough power to be useful here.
What's left? Nothing I can think of besides the "Hey George, see how bright this sucker is!" I certainly wouldn't want a 1W laser that I couldn't absolutely control where the beam was, and hand-held would be right out. I like my eyes.
(Yes, I own several lasers in the 500mW-1W range and operate them safely, with interlocks and keys, etc. They're not toys, but you can do fun things with them if you know how to do them safely.)