That's the only way they could since the screen curves on all sides. Will look like crap if it only covers the uncurved section. My main reason for a screen protector is to reduce fingerprints. Maybe the screen will be less fingerprint attractive. I'm not holding my breath though.
that is the only reason i want a screen protector as well. Because the oleophobic coating will wear off in 3-6 months. I usually go with ghost armour,but I'm hearing that glass screen protectors are better