We're beating up on you here Friendly, but I have to agree that this does add a nice addition to Minecraft. Many hours lost building in Minecraft and conquering the Ender Dragon with friends, so improved lighting in those environments would be pretty cool.
I think this sort of overall lighting improvement in a game it more important to me than things like how fire is reflected in a puddle or a room's contents on glass. The before and after shots in that article show the whole world looking improved and atmospheric. That is something I could actually notice. Also in a building game like Minecraft, being able to put a window in a specific spot and have the light stream in to get the effect you want? ...Priceless