I agree with the assessment by the director in the article, there is naturally going to be a lag, its just the way video systems work. From the initial synapse of movement, there is a processing of visual data that would be delayed slightly behind the person's action. How significant is what remains to be seen.
As for Sony Arc/Gem, the limiting factor remains the lack of a movement system via thumbstick. The latest images show that one has not been added.
The Carnival of Shadows - Folk Punk from Asbury Park, New Jersey
http://www.thecarnivalofshadows.com