Looks to me like Nintendo and MS are the ones who should be questioned, not Sony if you're talking console sales.
Nintendo better hope their portables do not take any more damage from kids playing on tablets, because if there's continued erosion into next gen, they are screwed.
Microsoft has never proven they can compete with Sony anywhere but the US, if you're conceding 2/3 markets from day 1, you've already lost.
Looks to me like MS/Nintendo are the ones in a tough spot. Unless Sony does something stupid like make the Playstation 5 $600 again or Nintendo creates a new miracle fad for soccer moms (unlikely), they've both shown they're not very good at competing with the Playstation brand.
That's not getting their "shit together", both Nintendo and MS had some very fortunate bounces go their way the 7th gen. MS had a full year headstart and then Sony's upper divisions forced Blu-Ray onto the PS3 making it $600, which means basically MS got like a 2 year headstart, because the first year for the PS3 was very slow due to the price.
Nintendo never has been able to compete head on with Sony for the core gamer market. The Wii was a miracle controller they purchased from an Ameircan inventor (after Sony/MS turned it down) that allowed them to tap into a different casual audience, but that audience has abandoned them in favor of smart devices.
