I am (obviously?) going to buy the ThinkPad Anniversary 25. By now we know it’s a T470 with a usable keyboard (yay!) and I am eyeing a pair of Packed Pixels displays (don’t want to link because I am not here to spam) and each requires one so altogether two DisplayPorts (they use the same panel as the 9.7" iPad).
We don’t have the specific Lenovo system your mention in our test lab, so unfortunately we cannot guarantee compatibility with our Thunderbolt 3 dual display adapters. Each manufacturer can design their Thunderbolt 3 systems differently, and those internal design decisions can affect if two video outputs via our adapter will work as expected. Looking at the model’s system manual -> https://download.lenovo.com/pccbbs/mo… (on electronic pages 52 and 53) it does not provide any clarification as to the number of displays supported via the Thunderbolt 3 port, but if taken literally only one display is supported.
Given the unknown compatibility and the third-party reports, unfortunately I would not recommend purchasing our Thunderbolt 3 Dual Display Adapter for use with the Lenovo T470. Apologies if that sounds overly negative, but we like to do our best to set honest expectations up front to help prevent frustration later on.
To your question, the other forum post you link to is not relevant as it refers to USB-C devices rather than Thunderbolt 3 devices.