As battery tech continues to improve, sales of these things will heat up, I think ..
Yeah, quite likely. And the convenience factor may bring more. Really nice with the chain saw, just make sure there's bar/chain lube, pull the trigger. Got tired pulling the cord on the gas ones.
That brand isn't known to me, but there are a couple makers who do similar, a whole line of tools that take "their" battery. (I did get the blower when I got my saw, since both came with battery and charger, and the blower wasn't a whole lot more than just a second battery. Easy choice, since I really did want a second battery