Yep, I thought that was the reason, but wanted to make sure folks knew you could get by with an older (and cheaper!) machine...
A bright display is certainly preferable... and can be had on an older machine if folks look around. You can often find these for less than 100 dollars.
My "dedicated" HP laptop gets used as the scanner and also its a neat place to keep service records, illustrations, etc... all in one place.
A great day to you as well.