As a self hoster, nothing irks me more that more software that takes control from the user to some random third party.
And I fail to see why anyone would use this, you need high speed internet capable of streaming 4k for one and if you have access to that, then chances are you also have access to a sufficiently powerful computer capable of running chrome locally.
Coming to security, this is a complete disaster. All your traffic including passwords are going to a third party server and you have to trust that server to not do anything shady.
This cant be economical either, or will be too expensive.
And the testimonial on the website, I find it hard to believe that a CEO of a company cannot afford a powerful computer but can afford a (presumably expensive) subscription service giving them access to a video stream of a browser running on powerful hardware.
Like another user said VNC can already do this, and much more without the electron wrapper.