If you have absolute power
, you are immortal
(you have the power to make yourself live as long as you like). Immortal has infinite lifespan
, and infinite lifespan means infinite time to do anything. Since you have absolute power, you can do anything.
Result: You have done everything even remotely interesting to you, or, everything. Well, the second part takes infinite time so you'll never get bored, but I can be bored even while there would be many things I could do, it's just that I don't want to do them. So, you'd get bored pretty damn quick.
See Michael Moorcock's Dancers at the End of Time for a good example about this.