Yeah! It would be great if it could hold up my Flat screen TV with out falling in the middle of a Super Bowl some year!
Unless you’re mounting it to something like masonry or solid wood, maybe old fashioned TV mounts are the best way to go here. The limiting factor would not be the gecko glue but the strength of the surface to which it was clinging. If all you succeeded in doing was pulling the paper or paint off the surface of some drywall or plaster, that would stink. Most flatscreens now have anchors in a standard pattern on the back.