I don't see the appeal much either. Especially with my propensity to charge and use devices simultaneously.
I have a wireless charger by my bed, and just ordered one to set on my lab bench at work.
I am using a google nexus 6, until the galaxy s6 comes around. The turbo charger is more practical, and I use it when I am in need of a quick boost or want to fully charge up the phone at a time point that isn't over night.
Wireless charging is just nice for connivence. When I go to bed later than my wife, or something akin to that, I don't have to full with plugging the device in. It also puts less stress on the usb port.
It will be nice at work, since I usually keep my phone on my lab bench. With the wireless charger...it will just charge while it is setting idle. Again...its a cheap connivence. Its not necessary.
With the future incorporation of wireless charging standards into cars, tables at starbucks, etc...it will be a nice feature to have. Once it becomes mainstream...I am sure apple will include it as well.
I don't think it is a make or break feature....yet. But once you use it for a while, it is convenient, and you have invested in the chargers...so you would prefer to continue using said chargers with your future phones.
It was nice for samsung to include it, and even better than they made it compatible with both standards.