Well done for making the effort to decipher the Korean page!

A WinCE device with a "non-standard" screen resolution (ie. not QVGA or VGA) should be interesting - resolutions seem to be a hard-coded feature of the WinCE OS so any change of resolution usually comes with a degree of pain until all apps support the new resolution (or you have to make do with the OS playing tricks and driving the screen at pixel-doubled resolutions etc.).

Since it's WinCE it should be possible to install apps such as Opera etc., unless i-Station have taken steps to prevent this.

Opera and other apps on WinCE running at the full 800x480 resolution could become a credible 770/870 competitor.