In addition to getting Remote Play support, Sony's VAIO computers will be able to act as a virtual keyboard for your PS3 system. The "Remote Keyboard" feature can be used in PlayStation Home and games that support the PlayStation keyboard. It may not be as portable as the official PS3 wireless keypad, but it should be far more comfortable. Although, we have some concerns over the questionable key mapping (image after the break).
Software support for PS3 connectivity is currently only available on the P series of VAIO laptops. If you can brave the Japanese website, and would like to try it out, download the software here.