Also reading that article, Richard makes a point of specifying 150ms was for that particular title.
Yes, but that was also a figure quoted by the developer, and specifically excluded display lag. So the difference between 200ms including display lag and 150 + display lag is not that huge in the first place.
Perhaps it can go beyond that in some cases, such as with 2 players?
Yes, that too, but Richard tested with one player. Note however that in the debug shot you can see it sees multiple people anyway, so even people just being in the shot could theoretically affect the lag, if the system is continuously scanning for multiple players that want to join in dynamically.
Having said that, I'm not really seeing where the lag is coming in. Processing overhead affects refresh rate, not latency. It's still taking one frame to process the data as the games are running at 60fps (in the case of Forza). Perhaps there's a multi-pass processing, requiring several pipelined steps that run across game refreshes?
To some extent it doesn't matter that the games run at 60fps, because Natal doesn't - it is a 30hz camera and from the last information that we got on this topic this is also the speed that it outputs its wireframe updates. Assuming it typically takes both the regular image and the point-cloud, it then needs to analyse that into the wireframe, and combine that with the previous data to produce its vectors (remember it outputs a wireframe where all the joints have predicted movement direction and speed information)
Also watching the Anton demo, it's good to see these consoles have finally found their identities! At the beginning of this generation, PS3 and XB360 were very similar and didn't offer much difference. Blows were traded over services and features, but they were both HD gaming boxea offering basically the same experience. Whereas now, these motion solutions are very different and will invite different titles.
I'm not 100% sure I agree to the same extent, but I do agree that the differences between the various motion tech are probably bigger than they have been in any other aspect so far. That said, we still get a huge overlap now between the type of games enabled by motion controls (e.g. we've seen table tennis, bowling and beach volley on most of these systems, and that kind of thing will continue), but yeah, there is definitely a lot of room for the two to specialise in different areas, given that their strengths are very different.
Personally, I'm most excited simply because motion controls allow for much more innovation, and together with physics becoming more prevalent and even (though still very early now) 3D display technology finally taking off (I'm willing to bet money on 3D being at the very least as successful as HD), creates an environment that will finally allow us to get truly new experiences (and yes, I know that Nintendo paved the way here! ).