Jailbreaking is for BREAKING OUT OF A CHROOT JAIL.
Android DOES NOT USE CHROOT JAIL.
ARM devices are not sold as common X86 gear is, there is no Newegg with a thousand mobos from which you can choose from.
No, I didn't think so.
Tablets are JUST LIKE LAPTOPS.
Samsung devices are firmware unlocked FROM FACTORY.
Loading custom firmware to it is AS TRIVIAL as installing GNU/Linux on a laptop that ships with msvirus.
HTC devices are firmware unlockABLE from factory.
You go to their website and enter your IMEI to unlock, then they are as trivial as Samsung devices.
All CHINESE TABLETS are UNLOCKED from factory. Just install your custom firmware. TRIVIAL.
THERE IS NO HACKING AT ALL REQUIRED TO INSTALL DIFFERENT OS ON THE MAJORITY OF ANDROID PHONES AND TABLETS!!!!