One obvious way of cost saving
I do hope that business's realise the savings that can be made using Linux desktops, aside from the cost of the OS the savings in software is insane and the lack of downtime will increase savings.
Most office workers will have all the programs they need to do their jobs, AutoCad, photoshop and games (which are about the only common apps used you can't get an equal equivalent in Linux) are not needed by most people.
In our office its about 60 linux / 40 windows spilt - strangely it is always Windows users that are offline the entire day when they have issues/viruses, etc (thus making the rest of the team work harder)