WoW/Glider: Is it legal for your computer to play a game for you?

Some background: MDY v. Blizzard should get a ruling soon. The EFF has an easier-to-read post on this as well, although a bit dated: https://www.eff.org/deeplinks/2009/09/you-bought-it-you-own-....

Reading this, I was reminded of William Gibson saying we live in the Future now; it's truly bizarre that there's an actual court case over whether I can have my computer play a game on my behalf.

I guess I am surprised that the Glider case hinges on the rights surrounding ownership of the client, versus improper use of the server, which is much less ambiguously owned by Blizzard.