Hey Mike,
I'm not sure how large of a display you need, but if you are looking for something you can program from LabVIEW and use to interface with a PLCs, it is probably worth it to take a look at the TPC series that we sell. The largest one is the TPC-2012, with a 12" display, and you can program these with the LabVIEW Touch Panel module. You can use shared variables to communicate with our PACs or tcp/ip or modbus to communicate with other devices.
Of course, if you need a gigantic display and touch-sensitivity is not important in your application, using a cheap laptop and projector might get the job done as well!
Best regards,
-Sam F, DAQ Marketing Manager