High end laptops are a good place to start when you are selling a ~$140 accessory.
I would be shocked if they didn't have plans to expand to other products/devices. My guess is that they are betting that Macbook owners are most likely to pay right now. I'm not certain, but I'm willing to bet that Macbooks have a majority chunk of the high end laptop market.
So if I were in their shoes, I'd probably start with macbooks in order to gain a foothold.
I am guessing they have licensed magsafe from Apple. Pretty sure they would get a call from Apple lawyers otherwise. There are universal chargers and batteries with all sorts of connectors which are not patent encumbered.
Kind of makes me wonder if Apple would cooperate at this stage and then consider buying the company later.
Fair enough. Obviously pg isn't naive enough to invest in a company that will get sued out of existence by Apple tomorrow. So most likely this product is a proof of concept of the technology and is circumventing the issue by perhaps incorporating Apple's MagSafe2 into their offering.
http://store.apple.com/us/product/MD504ZM/A/magsafe-to-magsa...
For the same reason Tesla built a roadster to start their company. Low volume and high margin is MUCH easier to achieve when you are small than high volume and low margin.
Watch Shark Tank for a while and you'll realize that even if you have a product people want, it's not trivial to scale a physical product business unless you have significant capital. Even if you reinvest the money you make, you are constrained by how quickly you can turn the money over.
If you wanted to cover as much current and future market share as possible (at least in the market they're targeting) I can't think of a better current combination than magsafe2 + usb.
They can't put an actual wall socket on it, and they already have USB. If they're going to put one laptop port on it, a Mac port is the obvious choice because it's the largest market.
I would be shocked if they didn't have plans to expand to other products/devices. My guess is that they are betting that Macbook owners are most likely to pay right now. I'm not certain, but I'm willing to bet that Macbooks have a majority chunk of the high end laptop market.
So if I were in their shoes, I'd probably start with macbooks in order to gain a foothold.