Google's new Pixel 4 and 4 XL smartphones can be operated by voice, face or hand.

You can look, speak and wave at the handset and never touch it.

The idea of touchless smartphones has been around for a decade. Pantech, LG and Samsung have all been there. Google Pixel 4 takes the concept another step forward.

Strategy Analytics looks at what Pixel 4 means for device makers, component vendors and carriers here.