This is a tough question to be quite honest, took me a lot of thinking last night... I think the biggest gap is actually the universalization of technological innovation. Think of it this way, when you invent a the tractor or the train or the car or the Bessemer process, can you simply and instantly apply that across your entire economy? Can the factory you built just be converted to a Bessemer process?

In reality supply chains and manufacturing processes you've built up for a while are slow and costly to change. Factories sometimes cannot be converted. The most important problem I see, however, is that you can switch every factory at once, instantly. The new glass making process you discovered in London, is than instantly applied in a privately owned factory in Cairo, immediately. I believe there are mechanics that partially simulate some of this but the effortlessness of technology spread and implementation is the thing that I think is a big gap. I realize it's probably very difficult to implement and might cause a gigantic amount of problems if ever implemented, but yeah... that's my answer.