So if I had my hands on one of the new iphones would it be possible..?
if the case with new iPhones is you can activate then swap the sims to anything (using the sim ejector tool) then yes
if the case is that soon as you take out the sim it will ask for reactivation - then no. but a hack will be available eventually.
so in short, if you can wait, wait and get a non-us iphone and hacktivate it...