Here's a bulky old CRT monitor used as a touch-screen without any alterations. It doesn't use an overlay, but instead detects position using phototransistors in the fingertips of a glove.

Apple's iOS 26 and iPadOS 26 updates are packed with new features, and you can try them before almost everyone else. First, check Gadget Hacks' list of supported iPhone and iPad models, then follow the step-by-step guide to install the iOS/iPadOS 26 beta — no paid developer account required.
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