It is displayed in color on viewers and printers that support color postscript, otherwise it is displayed as grayscale.
On the other hand, if grayscale prints aren't going to cut it, you want to make sure you look only at color printers within your budget.
All except the iPad have a grayscale display, called E-ink; the iPad has backlit IPS color.
Dycam Model 3 - The Logitech Fotoman Plus offered 24 bit color or grayscale.
The easiest way to do this is to simply switch the photo mode from color to grayscale, but this may result in images that seem to lack depth.