Here is the Port of VirtualGL, a Application Streaming solution, that produces great results on the OpenPandora(look here for an example: https://youtu.be/pHlX9Dr-uq8 ). I've written an GUI for the VirtualGL command-line tools where you can Create and quickly start different Profiles. Nice framerates even over the internal WiFi.

On the PC you'll need the VirtualGL Server, which can be found here: http://sourceforge.net/projects/virtualgl/files/2.4.1/ (Or here a direct link to the Debian Package: http://sourceforge.net/projects/virtualgl/files/2.4.1/virtualgl_2.4.1_amd64.deb/download) and an ssh server (like the openssh-server package in Debian)

For questions, bug-reports, feature-requests and an Tutorial look at the official Thread: https://boards.openpandora.org/topic/5600085-gamestreamervirtualgl/

Update(0.5.0.2):
-Added an Edit Button. You can also copy profiles by changing the profile Name
-Changing the Color Depth of the X Server doesn't need an complete reboot anymore, now you just have to log-out and -in again
-Fixed some small Bugs here and there