If I play games on my macbook bro 13", connected to an external monitor, what would a google chromecast do? Just curious.
I want to get a controller, just not sure if I NEED a chromecast.
As far as Stadia goes, a Chromecast Ultra (CCU) is only used to get a TV/display ready for streaming. If you already have a device that is supported, such as an Android phone or a device running Chrome, all you need is the controller.
@seneca15 Simply put, you don't need one.
Its much in the same way that you don't NEED the controller.
They may slightly enhance the experience (instantly switching between devices is a joy), but there is virtually no need at all.
Google really aren't hiding behind expensive hardware to access this experience. The only two pieces of hardware (CCU and Controller) are optional.