Ask Slashdot: Is There A Screen-Less, Keyboard-Less, Battery-Powered Computer?

Long-time Slashdot reader Wycliffe writes:
So I have a travel keyboard that I love. I can carry my OS on a USB flash drive. There are several options for portable battery powered monitors. The only thing I'm missing to have a completely modular laptop is the CPU/MB/RAM... I can get a laptop but it seems silly to carry around a laptop with a keyboard when I never use the keyboard. I don't need a long battery life, if I need more than an hour then I can find somewhere to plug it in...

I've thought about buying a small box like a Zotac and trying to replace the hard drive with a battery -- but does anything like this already exist...? Also, are there any systems like this with decent specs? Most stuff I see like the Intel Compute Stick are horribly underpowered compared to a decent laptop.

The original submission drew some interesting discussion. Another option is "a good x86/x64 tablet that I can install Linux on" -- especially with a decent processor -- or "laptop-like systems that got rid of the screen entirely... I just need the travel CPU part without the added weight of a second keyboard and monitor." So leave your best suggestions in the comments. Is there a good, lightweight computer that's battery-powered without a screen or a keyboard?