How the crap did Kid Omega end up on this list? He's proven himself to be pretty powerful and all, but I don't remember him doing anything that would point to 'unlimited potential'.

His thoughts became faster than light. He evolved into a higher state of being. He never died, even though he should have. If you read Riot at Xavier's, it tells you why he is an Omega.

It is a fun little story. The art is just absolutely horrible though.

"It is a fun little story. The art is just absolutely horrible though."

Well I guess each person has their tastes. But I personally think Frank Quitely is horrible. I do not see the appeal. 

He's only on omega status because of kick, it enhanced his mutant powers to the next level causing a forced evolution

How long can he remain in this disembodied consciosness form? Can he truly die after his physical death?

We don't know yet but he retrieved his body a year or two ago

Nowadays, he's in Wolverine & the X-Men