The lithography they use for example, why some people let it slip that performances could be a little smoother only to back pedal (honestly I lost track of the exact matter of affair, the point being that I might not be alone and it is MSFT responsability to clearly present their products no for people to run around tweets and what not around the web). It has new capabilities, I want to know more about it, I'm not alone, they've a little secretive about it.What's not clear about the S?
I suspect things aka the system uses significantly more efficient IPs, most the benefits go into power reduction. V-sync or soft V-sync along with adaptive resolutions are likely to hide away most of the potential performances discrepancies between the old and the new model. It could be a little technical to explain to most people, let alone during a game show. They could have shied from it as they might not want their exiting user base to feel like the have the lesser system.