Intel Compute Stick is probably exactly what you're describing. I've never tried one so I don't know how powerful they are, but using older Atom chips I've never been blown away by them. You might want to spend the extra money and get the Core m5.
A bit bigger but also more powerful is their NUC boards. You could probably just tape one of those to the back of your TV to keep it out of view.
Intel Compute Stick is probably exactly what you're describing. I've never tried one so I don't know how powerful they are, but using older Atom chips I've never been blown away by them. You might want to spend the extra money and get the Core m5.
A bit bigger but also more powerful is their NUC boards. You could probably just tape one of those to the back of your TV to keep it out of view.