I finally started playing with this mod and love it.

In the mcm you can choose to have oblivion gates in the cities...well i never played Oblivion but plan 2 one day and was wondering these gates are they eye candy or do they have a part in something too come?

Eye candy, I believe. They are left over from the Oblivion crisis

Yes, just relics of a long lost era. They don't do anything.