A much cleaner implementation that doesn't clutter the room with cables and an old laptop. Added bonus that I wouldn't have to explain how it works to each guest that tries to use it (assuming that the UX resembles other TVs people have used).
But people have used computers before. It works exactly the same as a computer. I think it's much easier than using typical smart TV interfaces.
It has the added bonus (over typical smart TV interfaces) that typing text becomes much faster. You can use the web browser as a web browser. You can use uBlock origin. You can have several tabs open at a time and switch between them at a sensible speed. It's so much better than a smart TV.
You don't need the room cluttered with cables, you can put the laptop in a cabinet underneath the television.