This is an interesting slide that really says nothing about performance or power consumption. All that they really say is that the next gen cards will use less power than the previous cards at an equivalent performance point. It is implied that the performance will increase and the power consumption will go down but the chart alone does not confim either. The 2 next gen cards listed could be faster GPU's that uses the current wattage of the Fermi or they could be ones that are the same speed but uses a fraction of the power. Most likely it will be somewhere in between (hopefully towards the performance end), however where the line is going to be drawn is as clear as mud.