i think all three are doing this because they recognize this as the future of the industry.
And yet, if this generation has proven anything so far, it's that people really want a traditional approach to console gaming and that gimmicks and unique hardware are irrelevant.
Hell, even the fact that the PS4 is the most powerful system is irrelevant when you compare its success to the PC market, where you can get significantly more powerful hardware for well under a grand, in the same price to power range a hypothetical PS4.5 would operate, and yet the PS4 is still the leading enthusiast gaming device.
It makes sense for Nintendo and Microsoft to be trying this idea out. Because both have completely fucked up this gen so far.
But let's be realistic, and Xbox One Point One is not going to magically save the Xbox brand when all their marketing, exclusive games, dodgy deals, double speak, water muddying and a lower price haven't moved the needle, and simply having a more expensive, more powerful system won't either. Hell, worldwide, that brand is dead, it's never going to be a competitor with Playstation again.
Nintendo are worse off, because, let's be honest, short of a miracle where they blindly luck out on another cultural zeitgeist like the Wii, the NX is going to be a failure. It'll sell worse than the WiiU and 3DS, and those proposed incremental system upgrades we're all speculating about will likely drive them into the red faster, not keep them afloat. They don't want to make the traditional, third party focused home console that the market wants, and their handhelds are only going to lose more and more marketshare to iOS and Android.
There is no incentive for Sony to bother with the same desperate tactics when the new generation of GPU's and HBM are just around the corner, and they can just leverage that to make a legitimate PS5 with full backwards compatibility (thanks to it's PC like architecture) after a normal 5-6 year generation length.
This idea is not the future, it's a desperate last move by companies that are throwing as much shit at the wall as possible in the hopes enough sticks to reverse their losing streak. Microsoft are Clearly done throwing billions into the bottomless pit Xbox has been for them, and Nintendo have just flat out made themselves irrelevant through sheer pig headedness.
For the market leader to suddenly start following the actions of those it's trouncing is just insanity, and far more likely to lead to the same balls ups that it's competitors are so adept at creating.