There is a lot of pressure mounting for even the most slothful corporations to upgrade, both their browsers and their legacy web apps that [currently] only run in IE6. This is partially to do with the growing prevalence of enterprise-ready web apps & services, but also with Microsoft's insistence that they really will kill XP and IE6 in 2014. The same thing recently happened when they finally killed support for XP SP2 (just last month) and there was a big run to upgrade millions of corporate PCs to SP3 (which forces an IE upgrade unless you do all sorts of not recommended funky hacks to prevent it).

As an aside, most companies for whom IE6 is an elephant-scale problem are using both AD and MS SCCM for user configuration management & group policy controls. CM makes it trivial to deploy stuff across the board, including complex software like OS service packs [and browser upgrades]. I posted before that my own org is in the process of upgrading everyone to IE8 right now, but we switched to Firefox as our standard browser about a year ago and are currently testing the new Chrome MSI (woohoo for GPO support), since even though Google's interpretation of the HTML5 standard includes a few things that aren't actually in the draft yet, it works much better with Google Apps.

You won't have to worry about IE6 in 2015.