I thought it would be a nice improvement, just laying my phone down in a few common places I charged it, so I bought a charging pad to try it out. Physics got in the way, even with a simple "high speed" charger from Samsung, with a Samsung phone. It was the case on the phone. Probably no more than 2mm thick, but it made finding the right position to charge very difficult. If it wasn't just right, it wouldn't charge, and even when it did it was much slower than the normal high speed charging.

I think there's potential in this arena, but it's not quite there yet, not for a lot of people and every day situations.