The latest version of the Microsoft Surface ( Surface Pro LTE ) has a consumer eUICC built into it. The version of eUICC is thought to comply with Version 2 of the consumer GSMA RSP standard. This provides LTE/4G service without the need for a regular SIM. However in addition the Surface has a slot for a regular removable plastic SIM card. It is possible to buy and download data plans for various countries using an LPA incorporated into Windows 10.
Operating instructions can be found here.
Machines incorporating eSIMs are expected shortly from Acer, Asus and Lenovo.