Synaptics's Clear ID sensor is not the first sensor to scan your thumb print through a display. The Vivo X20 phone, available now in China, is not the first phone to read your thumb through the screen. You might not know this if you'd seen the headlines coming out of CES - where Synaptic's Clear ID was haled as a game changer that fixed the problems we all have with the iPhone's Face ID and the Galaxy S8's awkward fingerprint reader. But it's the truth. This isn't the first tech to come along as a challenge to Face ID's impending dominance, but it definitely something different.