Nah Sony would have made something specifically tailored to this and if they would have we would already have heard about it. It just won't work like the Wii U controller, you would have serious issues with latency and PS3 having to project 2 different video outputs. Maybe with the PS4 and a revised version of the Vita. But still even then you would still have price issues and support probably still wouldn't be really there if it wasn't the main controller.

I have no idea, I don't have a psp. I'm just saying that that's why people think it could be possible.

Making both device think seems like something they could do with a firmware update on each device. Anyway, from my understanding the Wii U controller doesnt do more then processing the player inputs. (including motion type input)

Yeah. Even something as straight forward as Wiimote with MotionPlus addon failed pretty bad.

Thats through cloud saving not infa red streaming. Sony would need a whole new system and technology to do what WiiU is doing. Im not saying its impossible for Sony to do im just saying its impossible on the PS3. Remember its the WiiU console that does all the work for the display on the controller. The controller itself has no processor so all the work is done by some kinda technology in the console.

Just a heads up, i doubt the WiiU controller uses infrared, infrared is a line of sight technology and it would limit the controllers use to the same degree as the current WiiMote/Sensor bar setup. 

As far the PS3 being able to do the same thing with NGP -- your right that it would be harder for SONY to do, but it is still possible -- all it would do is basically require games to support split screen, with one screen for the tv and one for NGP. Ofcourse WiiU will likely perform better, but that is to be expected by a system built around this tech.

This is from wiki:

Remote Play is a feature on the PlayStation 3 and PlayStation Portable which allows a PlayStation Portable user to interact with their PlayStation 3's Xross Media Bar. Users can access music, videos, photos, PlayStation games, The PlayStation Store and various applications stored on the PlayStation 3's HDD, or external flash drives and optical media attached to the PlayStation 3.

Remote Play works by encoding a live video stream of the output image on a PlayStation 3, then delivering it over a wireless network connection to a PlayStation Portable. Actions performed on the PSP such as the pressing of buttons are uploaded back to the PlayStation 3 over the same connection. This is similar in concept to remote desktop in Windows and Linux. The audio may also be sent to and played by the PSP, or instead delivered through the normal Playstation 3 audio connections, thus allowing the PSP to be used as a remote control for a Playstation 3 acting as a media player.

Not exactly cloud saving I think...

Infared is waves and it can and was used on the Wii to transfer content from the console to the controller. Mii's and sound could have been transfered to the Wii mote via infared and i know infared is able to stream content depending on how much power you put towards it and how much ports to send/recieve data. I dont understand what you mean by line of sight technology but if you mean it has to be directly in front the sensor bar to transfer data then that statement is far from true.

Well how they explained the Vita they were doing that via cloud. Its kinda similar cause you still need a network to be able to do that with the PS3. WiiU is streaming from the console to the controller with very low latency and the controller has no processor in it. I dont think PS3 will be able to do that and if they do attempt it they might sell a peripheral to attach to the PS3 to enable that feature.

I predict lots of Vita / WiiU multiplatform games. The structure is so similar I'm surprised no one mentioned it yet.