Why can't Nintendo just sue Sony for imitation?

[Shonen]

I dont think nintendo even cares about it , cuz you see , they will come up with something so beyond that , that dont worth the money to this ...

Also you cant patent something like this it would be like someone that make a patent for TV ... all you can do is protect the method of how its done, but you can always try to do it , but nintendo wont give a darm for what MS and Sony are doing nintendo is all ready 5 years ahead anyways ...besides nintendo also had define how traditional controller are with the nes controller and they did sue anyone , so why the hell do it now ?