No, really: a blow-up plastic TV:

Bring back the excitement of the Drive-In movie theater experience right in your own backyard. The SuperScreen Outdoor Theater System is a complete entertainment package that includes everything from a 13' x 16' giant inflatable movie screen, high-output DLP™ projection, dual 10" speakers with stands and sound boards and even a DVD player. You supply the popcorn.

Because I'm sure your neighbors will love the midnight showing of Evil Dead II.