Comment by adrian_b

Good to know, but the fact that the knowledge about the possibility of connecting an external monitor is very well hidden on the Google site and the existence of a true desktop mode is even better hidden from any potential Google customers, does not inspire confidence.

From this state of affairs I cannot be sure that if I bought a Google Pixel it would really be usable with a monitor, as such hidden features could be removed at any time.

Other smartphone vendors clearly specify for their phones whether e.g. they support DisplayPort 1.4, so that they can use a monitor at a decent resolution, and whether they have a desktop mode.