Back in like 2006 2007 The wii came out and had motion controls and everyone loved it. Now its 2012 and the wii-u is coming out with the tablet controller which takes gaming to a whole new level basically putting an extra screen to make life easier. Who thinks that Xbox and Ps3 will follow suit and make tablet controllers for their next consoles? It makes the most sense. The wii-us controller is by far the best controllers so far in the evolution of video games.
Smartglass has been in MS planning before Wii U was announced so that is in no way copying because I know for a certain and having used it before hand. Though it was more of a control interface, but technically from what I had used, they didn't have game control there but from the E3 press conference they do, so that could have been added on later or was to be initally added.
Just to note, that smartglass will never stream games, it's due to latency, because smart glass works over the internet through xbox live and not a local connection to the xbox.
Sony had similar things with the PSP, so I mean they've done the second screen stuff before but in the GBA to gamecube manner.
At the end of the day it doesn't bother me what they do and if they "copy" I'm not going to be but hurt over it.
I'm a consumer, so basically I win as a consumer because of this competition.