Apple shows every indication of being a much worse monopolist than Microsoft ever was. Apple seeks to control the whole stack and eliminate competition at every layer - from controlling the apps that can be installed, to restricting expansion and peripherals, to controlling the tools used to develop for the platform. They are also quite adept at "capturing the consumer surplus" using tiered pricing, etc., to maximize their profit.
The overreaching terms in developer agreements, very aggressive (and overreaching) patent lawsuits, and restrictive shrink-wrap licensing are all efforts to protect and extend their control.
TL;DR: Apple is not your friend.