VAP = Virtual Access Point. Basically, it converts a hard-wired Ethernet connection to a Wi-Fi signal. Here is the announcement of wireless STBs. The last 2 photos in that post are the VAP2500.
I don't know what the issues were with the 4K PVR built-in wireless, but if you aren't having problems with your signal, then you should be OK.
Last edited by Dr.Dave; 2016-10-05 at 02:19 PM.
Reason: added more info