A touchscreen is far more intuitive and natural for the user. Touchscreens are durable and cannot be stolen when used in public areas. Touchscreens are easy to clean and can handle beverages being spilled on them, unlike keyboards or trackballs. It is unlikely that you would have to modify your software. Please contact our sales reps for pricing on UNIX drivers.
Touchscreens come in a variety of sizes.
A touchscreen controller normally uses a serial port, however MicroTouch also offers a USB solution. We also have chipsets for qualified OEM use. MicroTouch has the widest variety of touch input solutions. Each technology has it's own characteristics and strengths. The question is not which is best, but which is best for your particular application.