Like with all new things/gadgets you buy, Nintendo Switch (game consoles), car, laptop, iPhone, smarwatch etc. how long will it take for you to say, oh, it's not too special anymore? I would give it about a month before I say, iPhone X is just another phone. The interest/excitement on the phones new features will come and go and then a new one will take its place. The hope and longevity for me would be the supposed 2 extra hours of battery life over the 7. How long will your excitement last when you finally have the X?