Apple finally brought wireless charging and fast charging to the iPhone lineup but you can’t have it right out of the box.
The supplied 5W charger in the iPhone 8, 8 Plus and iPhone X retail box is the same old charger Apple has been bundling for ages. In order to have fast charging you need to buy a separate charger and cable. And they won’t be cheap, either.
Apple has tested the new iPhones with the USB-C 29W charger it supplies with the 12-inch Macbook as well as the 61W and 87W power adapters. The 29W charger costs around 59/49/$49. Then you’d need a USB-C to Lightning cable, which goes for 29/25/$25.
You could go for a third party combination, which is generally a bit cheaper but still expensive.
Finally, a 29W charger is much bigger than the standard Apple charger (and most Quick Charge-capable USB-C chargers).
But if you already have the charger from your Macbook or an iPad Pro then you’re just 1 cable away from having Fast Charge on your new iPhone.