As a university professor for seven years teaching CS (among other subjects), my advice is to narrow your focus. While multimedia computing is a good idea it does seem awfully broad. If you want to include the Amiga I would focus on the desktop video revolution which the Amiga played a good part in during the 90's. The topic is interesting, easy to research with lots of references and easy to frame for a paper:
-Rise of computers and their graphics: terminal characters to vector/bitmap graphics
-8 Bit era offered basic video titling for consumer based video and static backgrounds
-16/32 bit (Amiga, Mac) era brought 8/24bit color images/backgrounds, broadcast quality graphics, the humble beginnings of movies (ANIM/Quicktime), the Video Toaster revolution (computers take on the broadcast booth), rendered storyboards for film (Jurassic Park Amiga story would be nice here)
-32/64 bit brings costs down, cameras on every device, easy to use tools, the outlet everyone is looking for: the Internet / YouTube.
Issues:
-Speech: Fake News / Conspiracy Videos / Flat Earthers Everyone can now make a video. How does that effect society?
-Software: Adobe's latest software allows you to add/remove people, places, things from any video. Imagine how much harm can be done here. Can you trust what you see?
-Privacy: Where do people's privacy fit into this new DTV world?
-Education: Imagine growing up in a world with so much information thrown at you and you don't know if you can trust any of it. What kind of generation will emerge from it?
Conclusion:
Where does that put the future? What do the futurists say about these issues?
This is me off the top of my head with stream of thought advice. :-)
Good Luck!
-P