If MS and Sony's hand will, somehow, be forced, it won't be now, but probably years from now.
Switch philosophy is that you can play everything, truly, everywhere. Just like mobile devices (with or without TV connection). MS and Sony's stance is less valuable: play at home.
This the image that these "players" send to costumers.
Thing is, we are living in world that is everyday, more and more about portability.
You start at one point but you are not hindered by it. What you create/do, you can take it with you.
Nintendo is not only more in line with this than Sony and MS, they are also making strides in the mobile department. Just look at Pokémon GO and what it did for 3DS sales and is doing to the new Pokémon games.
Nintendo is making a bridge and is creating the idea that gaming on it's consoles is all about mobility, portability.
This is where Nintendo can win BIG.
By using their IPs in both markets (creating different experiences is a necessary step) they are taking themselves out of one market and glueing themselves to what is, without a doubt, the future of gaming, the portable market; they are positioning themselves for the future. Sony and MS aren't.
It won't take many years before tablets are close enough to console gaming.
Nintendo handled this already and created a console that might (not confirmed, i think) work it's best at home (docked) but can also deliver great graphics and experiences on the go.
If they succeed, you bet that Sony and MS will try to follow them... again.
