I use it on an iPad in landscape mode more or less exclusively, and I seems to work the same to me. That said, I don’t use advanced gestures (or any gestures, actually), so if those changed I wouldn’t notice. But the actual display on my iPad in landscape, navigation, etc., works well.
But that’s exactly what they just said isn’t UBI, with UBI you’d get to keep the money while working if you wanted to. “Universal” means everyone gets it, not just people who “claim to be uncomfortable working”.