Sounds intriguing
As well as thinking about what to include in this total conversion, if this is to be the basis of a scenario you need to decide on an objective.
You might consider basing this on the internet, with lots of stand-alone cities under barbarian control, and seven playable cities. You start out in the early days, using those terrain improvements around the cities, which are linked together by roads (copper wiring). As you research new technologies you get to build new city improvements (say Hard Drive upgrades as research improvements, and RAM upgrades as tax improvements). Copper wires can be replaced by fibre optics (RRs). Your objective is a monopoly of all the other cities.
Or have computer corporations battling it out
And don't forget the random viruses
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"The man who can smile when things go wrong has thought of someone he can blame it on" - anon
"Every gun that is made, every warship launched, every rocket fired, signifies, in the final sense, a theft from those who hunger and are not fed, those who are cold and are not clothed" - President Eisenhower
"Treaties are like roses and pretty girls: they last while they last." - Charles de Gaulle