Answer:
Thousands of these come together to make a digital image. What is it?
It doesn't live within a house, nor does it live without. Most will use it when they come in, and again when they go out.
A man calls his dog from the opposite side of the river. The dog crosses the river without getting wet, and without using a bridge or boat. How?
Of these things - I have two. One for me - and one for you. And when you ask about the price, I simply smile and nod twice.
A box without hinges, lock or key, yet golden treasure lies within.
What is always coming but never arrives?