Will there be any digital Imperial Edition for PS4 ? They say that we can pre order standart edition and after 4th, upgrade to imperial edition. Will this be available for ps4 also, if i buy Physical standart edition for PS4, will i be able to upgrade to imperial after ?

Yes according to the FAQ on the main site you can upgrade to the Imperial edition any time after launch.

Yeah i read the faq but they didnt really specify if it was available for Physical purchase and they didnt mention PS4 version anywhere, so i was wondering.

Still very unclear about the PS4 purchase.. i really dont need all the stuff that comes with the imperial edition, i hope we will be able to pre order from psn store or something like that.