The last time I saw a dos based POS system was a credit card running app some 7 years ago.

But how fast can it make the calculations for the jump to light speed?

Vista had a 10% growth rate in the past year, but how much of this was due to microsoft selling it on new pcs? Granted, some manufacturers were giving the options to select Vista or XP, but very few were giving the option of linux. Microsoft will continue to see growth when it has little to know allowed competition at the manufacturer level, where people can see the price difference between a windows pc and a linux pc.