Each policy is different, so yours would be new for old replacement, or possibly agreed value.They'd pay me for the amount I insured it. ie.: my D40 + 18-55 kit cost me $500. It's stolen three years after I bought it, insurance pays me $500 towards a new camera.
But isn't your stuff only covered when under the roof of your house if it's part of your home and contents insurance?
I'm not completely opposed to travel insurance.