My guess is that you are referring to the new connector

on the iPhone 5.

With the aid of an adapter, you will be back in business.
The iPhone 5 will connect to all TV's in your boats, RVs
The iPhone 5 will also connect to all your auto radios, but will not supply "full video", do turn by turn nav and netflix, Pandora etc. (I highly doubt the 4s supplied full video to your auto radios.)
The iPhone 5 has ALL the connectivity that the 4s had, so yes, it really is an upgrade.

Now, what really was your question?