I am planning to sell my laptop and use an ipad 4 as my only entertainment and productive device, but I also plan to jailbreak. I understand that it takes a computer to do that, so it wouldn't be a problem to use my gf's laptop when I need that, but what about the future? Can I just download apps directly to it and install them? What about themes and other tweaks? On android for example I always rooted my devices and I only needed a PC when I did the actual root method, from then on I could just download different OS versions or kernels directly on my phone and then booted into recovery and apply (flash) them, didn't need a PC at all.