Let's say, I had a newer version, does otg work? Can I install new programs? Browse web? Play PC games? Etc. Like a normal PC would? ( I know there are limitations) and how do I install Linux on it?
Well you can't install any desktop Windows(newer or older) directly on Android, because
it's NOT a PC of course, so you have to use a software PC emulator app, such as Bochs. And because it's emulating a completely different system with software, CPU and everything, you basically end up with something that has
the performance of a 1990s Pentium PC, which just will not run any recent versions of Windows or modern Windows applications and games. Even running Linux, you'll have to use a small lightweight version, like Puppy Linux, and not full Ubuntu or whatever. You install and run the Bochs APK, and then you load an appropriate image of the OS you wish to run. The more powerful the Android device, the better and faster PC emulation it can provide.
A Polaroid tablet, it's probably going to be quite a lowly and slow PC emulation, the tablet only has 512MB RAM total, less whatever Android and the emulator takes, might not leave much for PC emulation at all. Think about it, what versions of Windows can you install on a Pentium PC that only has 512MB RAM in total? 95, 98, 2000, Me, and XP, and that's it.
FYI: if you can read or translate Chinese, there's a lot of information about it here...
http://bbs.hiapk.com/thread-4750312-1-1.html
That PocketNow, Win 95 booting on Android you posted, and probably much of what's on Youtube, that stuff does come from China. However this is the official site for Bochs, which is not Chinese, and for Windows versions to run, you'll have to find your own options for that.
http://bochs.sourceforge.net/