The new LEO ISP sat system that is being launched will target latency time of sub 100 Milliseconds, early testing is in the sub 50 milliseconds. Your previous experience with VSAT based ISP is GEO based, latency always > 650 Milliseconds. The difference is the physics, LEO orbit is less than 5% distance of the GEO orbit satellites, therefore the roundtrip is significantly less. The antenna requirements will also be significantly less complicated than GEO antenna systems, omnidirectional panels/domes vs highly directional dish units that GEO requires.