AbbathTheGrim on 01 August 2015
The way I understand this article, Ueda said that the demo was finished for PS3 and later ported to the PS4 game engine.
From the article I don't get the impression that Ueda is saying that the PS3 to PS4 engine porting is something they are doing now in these months before release after most work has been done in PS3.
It must be that they have been working in the PS4 engine for a while, have ported whatever needed to be ported, and that Ueda wanted to drop the little fact that this demo was completed long ago and was straight up ported to PS4 engine.
Nintendo is selling their IPs to Microsoft and this is true because:
http://gamrconnect.vgchartz.com/thread.php?id=221391&page=1
