The new iDevice Dock Connector

Post Septemember 19th...

When they release the dock connector for the new iPhone (and presumably an iPad mini if it exists). Are they going to update the rest of the iDevices with new Docks across the board within a certain timeframe or if I was to buy the latest iPad 10" after the Septemember announcement is it going to have and old dock interface and in a year's time forever be out of date with peripherals?

You get me?

Rubber Duck