Honestly I wouldn't be surprised if post-3DS devices start adopting this tech like mad assuming it goes over well.
But the PSP is likely to do the same thing Sony does every generation. Here's what I see as PSP2: PSP Go form factor, up the horse power, make it higher res OLED screen, add a second analog stick, slap a touch screen on there (maybe a camera and accelorometers to boot). I'd be very surprised to see something much different. Basically, an Ipod touch with buttons.
But the PSP is likely to do the same thing Sony does every generation. Here's what I see as PSP2: PSP Go form factor, up the horse power, make it higher res OLED screen, add a second analog stick, slap a touch screen on there (maybe a camera and accelorometers to boot). I'd be very surprised to see something much different. Basically, an Ipod touch with buttons.