Google's annual Google I/O developer conference kicks off this week and ahead of the event whispers have emerged that the firm plans to unwrap a standalone VR headset. Now, this isn't the first time we've heard of a standalone VR headset from Google.

Following the launch of the Google Daydream View VR headset, rumours emerged that Google was planning a standalone VR headset that wouldn't require a smartphone, PC, or console to operate; it would carry its own processing power and software capable of running VR applications. However, this rumour was fairly short-lived, and subsequent details emerged which appeared to indicate the project had been axed.

But now Variety.com claims to have new details which indicate not only is such a project alive and well, but the fruits of it are poised to be revealed at least to some extent during the I/O conference, which starts May 17 and finishes May 19.

As well as onboard CPU and GPU chips which will allow the headset to run apps on its own without tethering from another device, its rumoured it will pack its own sensors and will feature "inside-out positional tracking". The idea is that the headset will be able to run straight out of the box, making VR more accessible for a mass market. However, the downside is that it may potentially be less powerful and have less storage capability than even a smartphone.

At present there are no further details about what hardware and features it may have, or a possible name. We don't know if it will be Daydream branded or not; Daydream being Google's Android-based VR project. We don't even know if the standalone headset will have any connection with Android or Google's Daydream app ecosystem at all.