From what I can find, Cap Touch is short for Capacitive Touch Screen. It uses the electrical impulses from the finger instead of finger pressure.
So I assume the old screens were resistive touch.
I also assume that the new screens may need skin contact, or gloves with the special finger tip to work..
The difference between Capacitive and Resistive touch screen
What is the difference between Capacitive touch screens and Resistive touch screens? Resistive technology has been somewhat overtaken by capacitive technology when it comes to touchscreen monitors and devices. To the average eye, both resistive and capacitive touch screens perform the same function, however there are some notable differences between the two technologies.
Capacitive touch screen technology is unrivalled, with numerous benefits including heightened touch sensitivity, a brighter and sharper display and multi-touch support whilst fine cracks and scratches do not hinder the overall performance.
Resistive touch screens rely on the mechanical pressure made by a finger or stylus, whereas capacitive touch screens rely on the electrical impulses of the human body which cause a change in the electrical field of the screen. Essentially, resistive screens rely on pressure and capacitive screens use electrodes to sense conductive properties.