On Saturday, a couple of interesting images of the Google Pixel 4 circulated on Twitter. They show an oval cutout on the right side of the Pixel 4 and Pixel 4XL's separate bezels.

Since then, many theories have emerged, but most of them point to Project Soli integration. We don't know for sure whether or not the Pixel 4 devices will feature Project Soli, but the technology itself is fascinating to say the least.

So let's get started right away.

Google has recruited some of its best engineers to create a piece of hardware that will allow the human hand to act as a universal input device. In smartphones and wearables, we currently use the touchscreen to interact with the system. Soli aims to remove the middleman (the touchscreen) by allowing you to interact with your device using simple hand gestures, without making contact.