iPhone 8 is in talks for quite sometime now, and it's also been rumoring that Apple will add wireless charging to it's new iPhone. As per the latest news suggests, Apple has officially join the Wireless Power Consortium- on organization that promotes the use of the popular Qi standard. Now Apple's name appears in the list of 213 members of the organization- source link provided below.
This add more weight to the earlier rumor of iPhone 8 to come with wireless charging, but we can't be sure of anything yet as Apple hasn't said a word about using the Qi charging standard.
Apple may indeed have been aiming for long-range RF charging: