I've got two large CRT TVs at home (as well as a couple of smaller CRT computer monitors) that I have no plans to get rid of. Some emulators do a good job of emulating the visuals of a CRT (scanlines and such). Not sure if any of them have found a way to use a real light gun. Some of those light gun games have been re-released on more modern systems (e.g. I think Duck Hunt was available on Nintendo's online service for the Wii and could use regular Wii controllers for the gun). Not quite the same of course...