I will disagree, gaming hasn't changed that much. Mostly still peer based now days. Maybe more graphics however that's still handled by the game console/PC. Game data and voice is still the same.
Maybe 4K however depending on compression. Of course raw no router can handle that well. Raw 4K is well over 10Gb. The time I was testing everyone's concern about the 857 heat issue. I did stream 3 different sources thru the 857 with out any issues, I had my xbox 360, boxee box and DISH all streaming from Netflix with out any hiccups. This was well before the mod came out. The mod was only for un-capping the QoS limitation on the UPLink only. This router was marketed as a media router. And it worked.