Q:

Can you run Windows 8 on a 800x480 small-screen device? 

I have installed Windows 8 Pro on a PC without problems. 
However, when a MiMo 7" touchscreen is used instead of the main monitor, and  the desktop is running at a 800x480 resolution, the regular applications (Mail, News, etc) do not run and say that this resolution is not supported. 
Is there a fix or workaround for this (other than using a higher-res touchscreen)? 

A:

No, Windows 8 minimum specifications for screen resolution is 1024x768. 
From Running the Consumer Preview: system recommendations:

One new element to Windows 8 is the requirement that Metro style applications have a minimum of 1024x768 screen resolution

