The EyeX controller and Steel Series Sentry Gaming Eye Tracker are both depth-sensing cameras that are able to perform this highly secure login step. What's more, Tobii's enterprise products are also supporting Windows Hello, such as the newly announced IS4 software and the Tobii EyeChip. As The Verge noted, this means that in the near future, we may be seeing more Tobii products appear in other PC's and laptops in order to take full advantage of the Windows Hello service.