This is already available for business with Windows Azure Desktop. If this is corporately managed then that is what they will use as part of the Azure/M365 subscription. If this is aimed at the consumer then it is no different to a full PC at home.
In terms of using it, Windows on a tablet? There is no advantage.
For work use any laptop (or tablet) is going to fail or the DSE requirements anyway, particularly if you are essentially moving from work office with monitors etc to home with just a laptop.
This is all about getting Windows as a subscription out. People are conditioned to paying for everything now on a small monthly payment regardless of whether it ultimately costs them more and crucially, whether they actually own it, now or at the end. Look at the success of this system in the car sector.
Companies want stable revenue stream and subscriptions do that,. It also allows them to make more money overall because people are happy to spend quite large amounts per month for a service. This is just the first toe in the water to Windows becoming a subscription service with consumers. Stop paying and it stops working (worst case) or best case goes into some barely functional mode that is not usable.
People will buy (lease?) new hardware for a monthly payment just like a phone and the OS subscription will be included.
Enterprises are not far off that already with their M365 & Azure subscriptions anyway.