NOOB question regarding benefits from PW jailbreak

Hi

I'm new to the kindle , I just got my Paperwhite last week. Now I read that, there is a jailbreak for this device. So, I wonder what benefits will one get when jailbreaking his PW?

Will it read different book formats such as epub, txt, rtf, Doc, html, pdb, ..etc
Will it read RTL language as I want Arabic on epub if possible.
Will it handle PDF files in a good way?

If it will do that, can one plz direct me where to start after the jailbreak.

thanks