First you are acting like poor Nintendo is the one that is always ripped by others but don't copy others ideas...
But just on the merit of the OP.
Microsoft makes the Surface, so yes if Nintendo is successful they could easily make modifications to surface line and include a version that would look close to switch (on their case that would only make detachable controls and perhaps launch more games with local co-op).
Sony already tried similar with phones and vita, but now have PSNow... but sure would be good for them to relaunch XperiaPlaystation, Playtab, etc all being PSNow capable and using scalability be able to play PS4 games..
So it isn't impossible, but since I don't think Switch will be the 100M+ system I don't think the others will rush to copy.
duduspace11 "Well, since we are estimating costs, Pokemon Red/Blue did cost Nintendo about $50m to make back in 1996"
http://gamrconnect.vgchartz.com/post.php?id=8808363
Mr Puggsly: "Hehe, I said good profit. You said big profit. Frankly, not losing money is what I meant by good. Don't get hung up on semantics"
http://gamrconnect.vgchartz.com/post.php?id=9008994
Azzanation: "PS5 wouldn't sold out at launch without scalpers."
