We have to consider the future anytime we talk about value proposition when it comes to anything with electric cars.
The ability to inductively charge is a MASSIVE benefit of electric cars over ICE cars. What's an ICE car going to do to charge on the move? Hook itself up to a tanker truck going down the road?
For me the biggest limitation isn't the cost because the delta isn't that much, but it's the non-standardness. It's not standard on the Tesla or any other car at least that I know of. It's not at any destination charger.
With the Tesla I paid more knowing that the value proposition was a tough sell. I wasn't a high mileage driver where the value really starts to show. Well at least I wasn't before I got the car.
With the Tesla the value gets better as time goes on. The supercharges, the destination chargers, etc.
If you think about it in terms of the future a plugless charger would be really cool. You could have a parking lot with a bunch of them without having equipment that can be easily vandalized or broken. It's also absolutely essential for autonomous cars unless you really love snake chargers.
But, for now I see the main benefits as being the following
1.) Never forgetting to charge. There are those of us like myself who don't always plug it in. I normally keep the state of charge around 40-80%, and it doesn't require plugging in everyday. There are also times where I simply forget.
2.) No wear&tear on the cord or the connector. I think people underestimate the importance of this.
3.) Summons the car in/out the garage without having to plug/unplug it
The main disadvantage I see in addition to what people have already talked about is the inflexibility in where I can charge. Right now I have it setup so I can either charge inside the garage or I can back up and charge outside the garage. I do that when I have to put my Jeep into the garage,
I am a little surprised that more Tesla owners aren't supportive on plugless charging especially considering how tailor made the Tesla is towards laziness. From one pedal driving to not having to stop off to get gas while going to work.