I used to lurk the forums but then I thought this up and joined..
Until now it was extremely difficult for artists (in any form, be it music, games, the written word, etc) to get their material to people, and thus gain acclaim and wealth.
With the advent of the interwebs artists can now pretty easily post their work and receive acclaim, but the acquisition of wealth in this manner is still difficult!
Bitcoins can change all of this! It becomes extremely easy to donate to your favorite artists with no fees, and without signing up for an account (e.g. paypal).
As bitcoins become a major currency, artists will have no reason to go through a third party to advertise, produce and distribute their wares.
Ergo, entertainment industries will become obsolete, and everybody will be better for it (besides the fat cats of course).
Now, this may not be viable for large artistic projects, such as movies, expansive games or physical artwork..
Additionally it requires people to not be leeches, but this is somewhat solved by the knowledge that without support the artist will have no reason to continue producing sweet sweet stuff.