I honestly hope that Linux doesn't become easy to use that quickly. The goals of the OS that it fullfils are stability, flexibility, and... an interesting following and community. If it were to mature in its useability too quickly, I fear that all three might falter, especially the last. Where the jokers on this site like myself aren't hardcore hacker enough to have the temerity to post on the LMKL, we all have the goal of learning how the system works more than just having it do what we want. When the majority of the community makes that switch accross I'm afraid things are going to change for the worse.
Regardless, as far as ease of use that I'm hoping for are greater support for the Linux Community as a whole from hardware vendors so that support development won't lag 2-3 months behind the windows world. An example of a good one would be Nvidia or 3Com, and an example of a bad one, Linksys; who packages their gear as Linux Ready, but really includes a text file on their driver disk with a link to a site that is coding the drivers, sometimes great ones in the case of Becker's, or horribly beta in the case of the linux-wlan project for wireless cards.
Nice topic though,