How would you adapt an existing technology for a new use, that hasn't been done before?

Question

If you were to take an existing technology e.g. bluetooth or wifi, what would you choose?

Answer 1

Every technology has advantages and disadvantages.
It all depends on what you want to do.

If you want to do a new wireless mouse, you would pick bluetooth (short range)

If you want to transmit HDTV across your home over wireless you would pick wifi