Quote Originally Posted by Puupertti Ruma
Sorry about the nitpicking but from Merriam-Webster Online Dictionary:

Anachronistic
1: an error in chronology; especially : a chronological misplacing of persons, events, objects, or customs in regard to each other
2: a person or a thing that is chronologically out of place; especially : one from a former age that is incongruous in the present
3: the state or condition of being chronologically out of place

Prochronistic, while I understand what you try to imply with it, is not an actual word. (At least according to Merriam-Webster) Also, what you would imply with it is the opposite of the intended meaning.
A simple google search would have done ;)

http://en.wiktionary.org/wiki/prochronistic

prochronistic
Belonging to a later time; technically advanced for its time.