Lenovo ThinkPad T470s
This article covers the installation and configuration of Arch Linux on a Lenovo T470s laptop.
For a general overview of laptop-related articles and recommendations, see Laptop.
firmware (e.g. bios and peripherals)
As of writing, the current bios version is 1.0.7. By visiting the downloads section (for the type HG/HF T470s) an iso can be downloaded and burned to disk which will perform the update 
This laptop is unique in that it retains the thinkpad dock connection as well as provides docking ability over USB-C. We have tested with the Thinkpad Ultra Dock and are able to utilize multiple HiDPI monitors via individual connections (e.g. no display port chaining). There are published firmware updates for the dock that require windows to install. DisplayPort chaining works via USB-C to DisplayPort adapter.
kernel and hardware support
Hardware video acceleration with Kaby Lake seems to work fine via va-api.
lspci and lsusb
On kernel '4.11.0-rc6-mainline' viaAUR on a 20HG T470s
00:00.0 Host bridge: Intel Corporation Device 5904 (rev 02) 00:02.0 VGA compatible controller: Intel Corporation Device 5916 (rev 02) 00:14.0 USB controller: Intel Corporation Sunrise Point-LP USB 3.0 xHCI Controller (rev 21) 00:14.2 Signal processing controller: Intel Corporation Sunrise Point-LP Thermal subsystem (rev 21) 00:16.0 Communication controller: Intel Corporation Sunrise Point-LP CSME HECI #1 (rev 21) 00:16.3 Serial controller: Intel Corporation Device 9d3d (rev 21) 00:1c.0 PCI bridge: Intel Corporation Device 9d10 (rev f1) 00:1c.2 PCI bridge: Intel Corporation Device 9d12 (rev f1) 00:1d.0 PCI bridge: Intel Corporation Sunrise Point-LP PCI Express Root Port #9 (rev f1) 00:1f.0 ISA bridge: Intel Corporation Device 9d4e (rev 21) 00:1f.2 Memory controller: Intel Corporation Sunrise Point-LP PMC (rev 21) 00:1f.3 Audio device: Intel Corporation Device 9d71 (rev 21) 00:1f.4 SMBus: Intel Corporation Sunrise Point-LP SMBus (rev 21) 00:1f.6 Ethernet controller: Intel Corporation Ethernet Connection (4) I219-LM (rev 21) 3a:00.0 Network controller: Intel Corporation Device 24fd (rev 78) 3c:00.0 Non-Volatile memory controller: Samsung Electronics Co Ltd Device a804
Bus 002 Device 003: ID 0bda:0316 Realtek Semiconductor Corp. Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub Bus 001 Device 006: ID 138a:0097 Validity Sensors, Inc. Bus 001 Device 005: ID 5986:111c Acer, Inc Bus 001 Device 008: ID 1199:9079 Sierra Wireless, Inc. Bus 001 Device 002: ID 058f:9540 Alcor Micro Corp. AU9540 Smartcard Reader Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 001 Device 002: ID 058f:9540 Alcor Micro Corp. AU9540 Smartcard Reader
The fingerprint reader included with this model `138a:0097 Validity Sensors, Inc` currently lacks a linux driver. libfprint bugreport. Synaptics (which has acquired 'Validity Sensors') has unofficially said that they cannot disclose the protocol, but may possibly release a binary driver.
Open source Linux driver is being developed by reverse engineering the Windows driver.