Totally disagree. There is nothing "gimmicky" about it. It is a luxury, not a necessity. That said, it is QUITE convenient, and I much rather use wireless charging than the traditional corded method. It is much easier for me to reach over and grab my phone when I wake up out of my sleep, and not have to worry about a cord reaching, or wrapping around something, etc. When I wake up in the middle of the night and roll over to check my phone, it's much easier to just pick it up, do what I need to do, and sit it back down and it start back charging. It is much easier for me to sit the phone down on my end table as I walk in the living room after coming home, and walk past and pick it up (without having to fumble with any wires). Is that necessary? No. Do I absolutely have to have it? No. Does it add to the experience of owning this phone? Absolutely. Is it very convenient? You bet it is.
I agree with all this. My experience using a wireless charger mirrors this to the tee.
Conversely, when I have to use my iPhone 5C from the bed, I have to make sure not to tug too far, or if I take it off the Lightning cable, I have to find the cable to put it back in when I'm done. With my Nexus 5 and the wireless charging, I don't have to worry about any of these things. That is the definition of convenience.