Its a completely common sense business move. They would be silly to do anything else.
Right ok, For me good business is doing things that puts faith in your customers not take it away, least of all when Sony haven't got the best history of quality devices, x10, Xperia S. Both utterly awful phones, they've brought back a lot of custom since the T and the Z so for them to pull a move like holding back features which are quite capable of being put on previous flagship devices like the Z1 and the compact to me is ludicrous business sense, especially as theres only 5 months between the devices and even less for the compact.
If it was a hardware limitation then fair enough, but these aren't so actually it's not a completely common sense business move at all. It's a sly rabbit punch that isn't remotely hidden and everyone knows it, DT2W is on several phones now, timeshift has been proven to work on the Z1, albeit at 45fps, i'm sure that Sony could have made it happen on the Z1.
Makes no difference to me anyhow, the second I'm able to buy the oneplus i'll be flogging this phone anyway.