The weird thing about using magic to replace tech is that almost everything tech can do, magic can do better.
Tech can give you a reliable(ish) conveyance that runs on a somewhat readily available, but unfortunately not renewable, natural resource.
Magic can give you a completely reliable conveyance, that runs on nothing, and shrinks down to fit in your pocket when not using it.
If you gave me the choice between, say, a Lotus sportscar, and a goat of traveling, for free, my only question would be "does the goat come in black?" It's a legitimate limitation that the goat only runs at 28 mph, but there's no reason you can't put Expeditious Retreat in that fucker's mix of spells, and get almost 60 mph out of him. If you gave it, like, Cuffs of Striding and Springing, and put ER on it, you'd get 68 mph out of it.
The Goat of Traveling only has the following problems compared to a car-
- Not enclosed, so it's more like a motorcycle
- Only usable up to 24 hours a week
- Can be broken in Statuette Form
But it doesn't require gas, most people probably drive less than 3.4 hours a day on average, and you could put it in a case if you were really concerned.
So a Magitech Society should have Figurine Dealerships. Your Figurine has no key, but it may have a loop to put on a keyring, and you may get a small adamantine case (maybe the case has the loop) that you can keep it in for safety.
Magitech TV would be better than the real thing too. Broadcast frequencies limit the number of channels, and it's all controlled by big corporations. In contrast, Magitech TV is a screen of water contained in a thin glass tank with Use Activated Scry. You don't have channels, so much as people who want to broadcast something give out a coordinates. Items of Programmed Image take the place of video cassettes and other media storage. You could seriously program an image to take place in magnifying glass scale on the Programmed Image item and the Scry Screen scrys on the interior of a box nearby--a magitech VCR. Again, this set up can't break. Worst case scenario, a crafter sells limited use items as a magitech form of planned obsolescence.
Actually, hell, that makes me realize that movie rental is super easy in magitech. No need to worry about returns, you're just selling single use items of Programmed Image (or whatever).
And again, this can be way smaller than it's real analogues. PIIs can be the size of marbles, the Scry Screens can be sold without water in Shrink Image form. Hell, if you wanted, you could include a "Dust of Create Water" with the Scry Screens for a really minimal charge. Portable DVD Players become a pan, a bottle of water, and a bag of marbles. And it's all high fidelity. Hell, your TV comes with built in video chat capabilities for no extra charge. Hacking cable becomes figuring out your hot neighbour's bedroom coordinates and their boning schedule. TV Guides give physical coordinates and times of events for people who want to tune in.
Magitech Society doesn't have newsvans, it has rugs of teleport ring and people continuously casting Commune with the god of Journalism for scoops, and a Message service that sends out coordinates when they're live on location.
Edit: But the thing is- as I understand it, there are three big keys to driving a technological revolution (based on a quick google for what allowed the Industrial Revolution)- a population boom (or other thing resulting in a higher percentage of people not needed to work fields), a resource boom (or general abundance of resources), and policies/social innovations which make it feasible for society to move past artisanship and into mass production.
So D&D World needs to get a population boom-- maybe a sect of druids decide to start blessing the crops every year, leading to an increase of food, leading to more people being born/living to adulthood and less need for every person to work the fields (a 1/3 increase in crop productivity should mean roughly a 1/3 reduction in required manpower, right?); a resource boom-- maybe a magical substance is found that takes the place of XP in crafting, maybe the magic mystery dust that goes into making items is found in a giant deposit or something, whatever it is, suddenly the most costly resources for items is available in huge quantities and prices can drop; and the introduction of true banking (a friend of mine likes the idea of Bahamut introducing banking backed by his hoard, and it is an interesting concept) as well as government policies that recognize intellectual property.
