I think you're spot on with the mini-computer to PC transition. This carries all the same echoes of the frontier-days of early PCs. Initially, people (myself included) wrote tablets off as being a toy for enthusiasts, and now they're reaching a level of adoption that's shifted the question from "Why would I buy one?" to "What's the best one on the market?" which can only be good for consumers and computing as a whole. Microsoft ended up winning PC's for a good twenty years, and have gotten destroyed by Apple in terms of branding and attention in the past twelve years or so. We'll see how they do in the teens.