We are using ThinkVision M14 units in this age of home-office...
1. For the Workstation series, M14 would work for any of the ThinkPad workstation class introduced since Summer 2018.
ie: ThinkVision M14 would work with P1 (1st Gen), X1 Extreme (1st Generation), P52, P52s, P72, and onwards.
2. M14 require DisplayPort 1.2 Alt Mode (this is a must), which runs over what looks like a normal "USB-C cable".
For ThinkPads supporting Power Deliver 2.0 (ie: above models mentioned in (1) above), you only need this single cable to supply both power + video signal!
Hint: Do not lose the supplied "USB-C" cable (supporting DP1.2 Alt Mode + PD 2.0)!
3. Our X1 Extreme (1st Gen) can run two units of M14, morphing your ThinkPad into a 3-monitor setup!
4. We also use the Docking Station 40AN0230UK which also came out summer 2018, specifically for supporting above models mentioned in (1).
This 40AN0230UK also support M14!
Sources:
www.tomshardware.com/reviews/lenovo-thi ... -kickstand
www.lenovo.com/hk/en/thinkvisionM14