I could see you buying a CD-I for nostalgia, but if you don't have any fond memories of it, you won't get any enjoyment out of it at all. You would probably have slightly more fun if your work gave you their old 32X unit.
This is pretty true, but even still, most people don't get the opportunity to play a real CD-i so I guess it's cool to have the chance to experience the terrible games everyone talks about.
Also I was looking through a list of CD-i games and noticed that Brain Dead 13 and The 7th Guest both had CD-i ports. If you haven't already played them, they might be worth a go for the non-joke options (although I can't vouch for the quality of the ports themselves, the games are good)