Originally Posted by ip4weather
dont worry ipod 5g will be full supported next 2 years...
I agree with this, many developers will want to ensure their games run on 5G (if not 4G) to reach as wide an audience as possible. Also, I suspect the indie developer dominated iOS game scene won't necessarily be equip to fully harness new technology sufficient to require only 5S+ for some time.
Some have said that despite the 5S claims of having a monstrous graphics display there isn't enough RAM to make suitable use of graphics chip for gaming anyway.
When we do start seeing more performance pushing titles come out, I personally will be more concerned about Apple's storage space limitations than I will be about compatibility (games like Infinity Blade III might be impressive but with 1.5GB download size my device can only hold so many, successive more graphically detailed games will bust my storage).