Well it's like this. This is a common thing seen in a lot of places. For the moment deal with it. Just so you know, where I come from some of the biggest companies use pirated copies of Windows. But once they get to a level where they can shift over then they inform, say Microsoft, and begin the transition slowly.

I think you should wait for your company to reach a level where they can do that before you really make a move. But you can also ask yourself. How much longer till you hit that kind of profit to even begin transitioning slowly. Too long for you to be comfortable? Well you aren't willing to quit. So search for alternatives to be used at whatever point possible.

Here's a start. Prezi for replacing traditional slides? (You don't have to build it all funky like the examples. You could still build it in a powerpoint-ish style.)

Before you suggest anything make sure you have an answer for when they look you in the eye and say "well what would you do then?"