The form architecture was so drastically changed from Oblivion to FO3, and there were even some big changes between FO3 and FONV. I can only imagine how drastically different they are between Oblivion and Skyrim.
The creater of all the previous xEdit apps is currently unable to make one for Skyrim, and cannot release the source code due to some proprietary bits of code. There are some efforts by other modders (using Java in at least one case) to replicate the functionality of xEdit, but they aren't in a public state yet AFAIK.