Few things in life are definitively good or evil in their entirety. This is one of them.
I have no idea what these keys in the center of keyboards are named. What I do know is that recently some manner of vertical orientation was spawned, and it is an abomination.
Be very careful when you buy keyboards now or you may find yourself wildly scrolling back and forth uncontrollably in your applications, or typing over large swaths of text instead of inserting. Even jumping to locations you never intended!
This new vertical orientation is a most vile, confusing and even dangerous development. Be wary!