Doesn't matter, Ka-band spot beam or whatever, the signal has to travel up to a satellite 22,000 miles up, and 22,000 miles back down at the speed of light. Bad latency (high ping)is inherent to satellite internet.
Yeah, it's a long trip. To make matters worse, Direcway and Starband route their connections through a lot of processing on the satellite, which slows things down even more. Wildblue's bent-pipe architecture and the Mentat stack should have better throughput for web surfing and file downloads, and it may be good enough for most streaming media.