the fact that google is trying to to use a fighting game to showcase their product should tell you everything you need to know about their understanding of the market.
A game that demands low latency (like a fighting game) is a great way to demo how noticable (or not) the latency is on your setup before you buy any other games that need little to no latency to enjoy.
Nearly every review I've seen mentions that there's just enough latency for it to not feel good, with some visual stuttering occasionally.
Mine gets here tomorrow though, so I guess I'll wait and see for myself.
I've had 1 lag spike (that resolved itself almost immediately) in almost 2 days of playing on my home network, with zero problems so far. It's honestly pretty mind-blowing.