It’s already possible, with a remarkable 2 and a special vnc client https://github.com/matteodelabre/vnsee. Though I have not tried it yet, it looks great, but the screen is way smaller than an usual pc monitor
I have a Onyx Boox Max, an A4 b/w e-ink device. I can’t use that as a screen, due to too low refresh rate. Writing on it with it’s pen is great, but typing on it is horrible. The slight delay breaks the usability.
I don’t know how that stacks against the remarkable 2.
Try learning vim. If you’re typing confidently and using the commands you can use it with higher latency.
The device looks neat, but I don’t like the “Connect costs $4.99 per month” stuff when you’ve already paid for the device. Is the device fairly locked down to force you to pay for their cloud service?