where is Interaction Design going?

hi everyone,
i really dont want to sound ignorant.but
what is HCI or HF professionals ?? what is experience design??
can someone just give me a simple clue?
i have never heard of this terms before…
and from my little little experience as a student
i had my senior art exhibition back in April
and it was when i knew nth about interaction design…
i just made a piece [ intestine like sofa in red laying in the lobby] that
audience can play with or particapate.
I think that people are getting sick of “being told to do sth” and i think as a designer/artist , it’s really intersting to create something and encourage other’s creativity…like after my show, everyone came to me like “yeh maybe i would do apply the idea to my new project and make it look intersting…”
well i hope i didnt type too mcuh non sense words… :blush: