So, you're saying: my chain of inventions, should I ever find myself in medieval Europe, should be: electricity > capacitors > computing > displays > 3D graphics > CoD? I was being cheeky there, but now that I think about it, it's a damn good, if absolutely weird, backstory for a novel. Explore what happens to Europe and the world as a result of them having video games available to everyone. I wish I had the brainpower and mental tenacity.It's not entirely facetious to argue that medieval Europe fought the Crusades because they didn't have COD:Infinite Warfare.
It's almost forgotten to time now, but Patient Zero for steampunk was a charming and thought-provoking (if sterile) novel by William Gibson and Bruce Sterling called The Difference Engine. It posited an alternate timeline where Babbage and Lovelace got their Analytical Engine working in time to provoke the dawn of computing in the 1840s. 