Yeah, because the mats can be used for multiple phones/devices (certainly at home) and the convenience would be great. So often in the past I have realised the phone has almost no charge at the end of the working day and if I decide to go out on the town I'm left without a phone for most of the evening. Keeping the battery topped up throughout the day almost without thinking about it by using a Powermat would mean the phone is always at 100% charge when I leave the office.

Obviously the mats are one-off purchases, and can be used with other phones in future as I upgrade devices (assuming those devices are supported by Powermat, and my guess is the company will support most mass market devices in future).

And if you have a partner and/or kids at home each with their own phone the reduced number of chargers plugged into wall sockets and left on 24x7 may even save money in the long-term - one large mat with one charger could serve up to 3 or more people in one household.

Eventually you'll just be buying new batteries/covers for each new device, so $30-$40 for each device isn't that big a deal for this level of convenience. Maybe at some point in the future Qi will make Powermat redundant but until then it's not that big an outlay.

I could, but neither would be very practical so I'd just have wasted that money.