I think they will only update 15/17 and wait for Llano mobile APUs for 13". I am sure Llano will be the 1st AMD chip in a Mac. It should be used in 13", MBA and mac mini.
Only other option is wait for Ivy bridge which as 16 EU, in built memory plus other enhancements for GPU. May be that will be a better IGP solution with intel cpu(which should destroy Llano on CPU intensive benchmarks).
Only other option is wait for Ivy bridge which as 16 EU, in built memory plus other enhancements for GPU. May be that will be a better IGP solution with intel cpu(which should destroy Llano on CPU intensive benchmarks).