Which 4K/5K monitors with built-in webcam???

[Killerbob]

I'd like to upgrade to 4K, or even better 5K, but I would like a monitor with built-in webcam, just like the ACD and ATD I enjoy right now.

The only one I have found is the Lenovo LI2821, but that one is not particularly good display wise.

Suggestions?

 

[Average Pro]

Although the site is from the other side of the pond, i haven't found one that provides as much info: http://www.tftcentral.co.uk/news.htm