Is shadow of the colossus PS4 worth getting if I haven't played original?

Play it!
Are movies worth a watch if you’ve never seen it before? There are plenty of things that have remakes or remasters and normally you wouldn’t need to have played the original to play the remake.
The remake is supposed to be better so give it a try!

I played the original. I guess I am spoiled by the God of War games, so, it wasn’t that impressive.
I would recommend the God of War, over this game, if you like games like that. Just my opinion. I thought those games really took the platform, to it’s limits.

It can only improve is my assumption so, yes. Ride those giants!