One of the biggest issues I see with the use of WiFi (CE or Commercial) is that of security. We in IT have made the realization that its really freakin easy (well, not really, but sorta) to change data before it reaches it's intended AP. As a result, we encrypted the stream... WEP was broken shortly thereafter; then WPA, then WPA-2, etc. As a result, the basic idea was to change the protocols higher in the stack to prevent authentication and what not, so we now have things like NAC (Network Access Control)/NAP (Network Access Protection) which prevents the offending AP access to resources on the network...
Point being: If we use WiFi to control the systems, any schmuck with a laptop could do some damage, even if encryption was used. My thinking is that if more and more people hop onto the wireless bandwagon a major change is going to have to take place for security.
Perhaps a modified version of WiFi specfically designed for show control is in order?