His differences in business strategy are exactly what I've been saying they are for quite some time now and exactly why 3DS is booming now where as Vita is stalling.
Mass consumer won't want to simply take their PS4 on the go. They want fresh different experiences that make sense for gaming on the go.
This is why 3DS will compete well even as Apple and Google continue to expand and mature their gaming portfolios while Vita will have a short life-cycle.