....for a desktop computer, display, keyboard etc...
....then try a Pipo! A proper computer in a tiny box. No, it's not a tablet, runs Windows 8 and Android, though not at the same time of course! Here's it is running the Winradio G33DDC, stereo sound, 4 USB ports, SD cards, runs on a 12v external supply so you can run it in your car. The wall wart supplied was a switch mode which made a lot of noise on the HF radio but a linear supply works well. Excellent screen, although it's tiny, it displays at 1280x800 pixels.
Google for Pipo X8.