I don't think I've seen certainty, I've seen optimism and to be fair Nintendo fans haven't had much cause to be optimistic in the past 18 months. Let them enjoy it. It seemed an almost a foregone conclusion just 9 months ago that both the PS4 and XB1 would steamroll passed the WiiU.
I think the source of the current optimism is momentum. Wii U seems to be gaining, some, whereas the XB1 seems to have lost momentum and for now I'm struggling to see how's it's going to regain it against the PS4.
Nintendo has started to do some things right with the WiiU but regardless they need to at least maintain and preferrably build on the current sales momentum if they want to have any chance of remaining in second and turning a reasonable profit on the system.
