I do wonder what this is going to look like. If they want to be fully backwards compatible they can't add additional hashing units, that would require a protocol update.
Perhaps they can leverage a higher frequency at the same power use of the gen1 chip.
Or lower power use for the same performance could be interresting for those sensitive to electricity prices.
Also a smaller chip means more chips from a wafer, thus resulting in a cheaper chip. Presuming 55nm isn't four times more expensive then 110nm.
The chips are by far the most expensive components in a miner, making them cheaper could make the whole miner cheaper by a significant factor.

I still want the gen1 chips I ordered. I'll just get the gen2 ones for a new miner.