ADS-B decoding with PP and Virtual Radar

I've just gotten everything set up to decode ADS-B using RTL1090 and either Plane Plotter or Virtual Radar. I've been told that not all planes are required to use this mode til 2020. With the ones that I do see (I"m on the 15th floor of a co-op right under the LGA flight path), there is rarely any LON/LAT info so nothing on the map of PP or VR. Am I missing something or is this just the way it is for now. I'm not sure what the point of purchasing PP is unless this info is there.