Is it really? I've got an S6 that I got on launch, so it's coming out of its contract next month. I'm not convinced though, there's nothing in the S8 that makes me think "Oh yes, I want to spend R600/month for the next two years all over again." Heck, I've got better things I can do with that money.
I don't care about the S8's iris scanner (my S6's fingerprint scanner works just fine ta), I don't need my phone to be a desktop replacement, I don't use Samsung Pay (although I can already use FNB's tap-and-go NFC payments on my S6), and I don't have a Samsung Gear VR (or remote). What else is left? Bixby? ROFL, I think not.
Sure the S8 is a great phone but R600+/month*24 is even better to have