Like old Think Pads, the keyboard has a nub in the middle that can be used to control the pointer for web browsing. It's outfitted with Bluetooth, so it can be paired with other devices.
The Wireless Keyboard is priced at ¥5,000 (US$62) (£40)

It looks nice, but I've never liked the "nipple" and I hate the trackpad, so for a mouse, I'd have to go with USB.
And the price is way over the top just to have a PS button.
I actually think it's just a combination of buttons, like the windows key is CRTL+ESC. It's finding the right combination to turn a PS3 on and off with any regular keyboard.
Now if they added keyboard and mouse support in games... would you go for it?