The amount of nasty remarks and insults you give to a person who is just curious and wants to learn about lasers is just disgusting. I didn't attack you at all. I didn't say anything nasty to you. I simply asked. Yet you literally called me a "dumb fuck". Thanks for your answer.
http://en.wikipedia.org/wiki/List_of_laser_applicationsIn that list, there are plenty of things that can be done by your regular, safer, cheaper, available lasers, like making a laser sight.
Of the things that cannot be done by the safer lasers, the only one you can really do without a lot of extra equipment and training is laser engraving, and cutting/burning stuff. That's it. Those are the use cases you asked about.
Read about them (lasers are indeed cool) and learn a lot.