Answer:
Digital white-out.
I am a caribbean shape that makes ships disappear
Brown I am and much admired; many horses have I tried; tire a horse and worry a man; tell me this riddle if you can.
I soar without wings I see without eyes. I've traveled the universe to and fro. I've conquered the world yet I've never been anywhere but home.
What has many keys but can't open a single lock?
My days are numbered.