Nintendo's pushing out a version 4.0 of its Wii U system software, and it's bringing a few unexpected -- yet welcome -- changes. Ironically, tweaks to how the hardware handles titles from The Big N's last home console headline the update. Folks taking Wii games for a spin will now be able to do so using just the GamePad's screen, and enjoy Dolby Pro Logic II surround output. With the fresh code in tow, a variety of USB keyboards are now supported, to boot. The box's internet browser also got some attention with the update, as it's been bolstered with the ability to open PDF files and remember user login details for web sites. Check your Wii U for the update or click the source link for the full changelog.