You want to be eco-friendly, sure, but that doesn't mean you want to ugly up the roof of your house with a bunch of solar panels. I mean, come on!
That's why this solar glass is pretty great. Simply install it in your normal windows and it'll help power your home, looking exactly like any other set of windows. Your guests and neighbors will be none the wiser.
On the other hand, perhaps you're in the camp that feels that without everyone knowing how eco-friendly you are, it isn't worth doing. In that case, maybe you should stick to the rooftop panels. It's just nice to have options!