Originally Posted by charmian
I've heard that what really makes a difference with stylus input on tablets is getting a tablet w/ a digitizer, like the HTC Flyer. However, these don't come cheap.
A "digitizer" is a generic name for any device that converts analogue input into a digital form. In this case, the analogue input is a touch on the screen. All touch screens are digitizers of one form or another.
Some forms of touch screen are much more accurate than others. Eg the Wacom touch screens found on Tablet PCs and some eBook readers are extremely accurate, being able to resolve to a fraction of a mm. Capacitive touch screens are much less accurate - you really can't use them for handwriting.