My dad happened to have an LCD television around he gave me, so I can play games and watch movies on that. As for light gun gaming... well I don't do that often, but I think what I'll do is get a small-scale TV, one that is easily carried and has RCA ports (needed because the Namco Guncon actually plugs into the yellow jack).

Of course, the other option would be if any light gun games get re-released on Switch. I've also heard of light guns meant for emulators like MAME, and I think these basically work like wiimotes. Which the only thing I've heard bad about that is they're not as fast or accurate as genuine light guns, but I mean, at least with this option I could play a non-crap version of House of the Dead 1 (the only game in the series to never get an arcade-perfect home port, only a cut-down Saturn and PC version).