If you want to get ahead of the Joneses, this should do the trick.
Sony has just made a super-giant telly, originally designed for theatre operators, available to the public.
The Sony Crystal LED television is selling for US$5 million ($7.5m) and has a 783-inch screen on the diagonal, or just under 20m.
The set is 19.2m wide and 5.5m high, or the equivalent of three average-size men standing on each other's shoulders - so you'll want to push the couch back a fair way for a good viewing experience.
The Crystal LED (or CLED) display offers a 180-degree viewing angle, and supports high definition video up to 16K (outside of Netflix and Amazon Prime Video, few streamers and broadcasters are supporting 4K or ultra high-resolution video, let alone 8K, and no-one's shooting anything for 16K yet, but never mind - future-proofing, eh?).