So, it seems like a thousand trees fall per minute and then dissolve into nothingness. I think trees that fall should be harvestable for firewood and will despawn at the end of the current season (so it doesn't crowd the forest floor). In theory you probably wouldn't want to built a new home with a dead tree but I'm sure you can keep warm off of it - hint: you can, I've gone camping before.
In theory it would require less chopping. Amount of firewood can vary per tree size, I suppose.