From the time that the original iPad was released, people have been trying to make it a desktop / laptop replacement. Other PC manufacturers have jumped on the bandwagon, producing their own tablets, running both Windows and Android. Ultimately, it was Microsoft that made the best inroads in the “PC killer” avenue, ironically with the Surface, until now.
The iPad Pro, with its new desktop-ish iPadOS, combined with support for peripherals that has been added in opens the door for the iPad to make the leap from a companion tablet to full fledged laptop replacement. While reading the Cult of Mac, I read an article on a kickstarter campaign that brings the power of a laptop dock to the iPad Pro, giving it nearly equivalent abilities to a laptop.