Gads, how threads do wonder... Your mention of Nikola Tesla took me back to my days of satellite development & testing vis-a vis magnetic flux density. Alas I stray-
What I'm most curious about is what the trade offs are in terms of battery longevity, weight, size, cost, etc., though I suppose I'll have to wait until someone has actually tested one of those Dell critters.
Inductive charging is inefficient (not all of the energy makes it into the battery; some is wasted) and requires space inside the device, leaving less space available for other things.
Whether or not those are important depends, I suppose, on the application. A laptop doesn't typically consume that much power anyway (less than a 100-watt light bulb, in most cases), so the fact that it's wasteful probably isn't a big deal for most folks.