I'll try to explain. Roots are roots, what we call 'air roots' are ones on a potted plant that just happen to grow into the air.
Have you seen pics of Phals growing in the wild? They grow on trees, so their roots always get plenty of air movement, and they rely on rain and moisture in the air to get water. So the roots are used to growing freely.
For convenience, cultivated phals are potted. This is not natural for them at all, and they will put out roots outside the pot, searching for moisture in the air. That is a more natural way of growing for them. So the term 'air root' only really applies to potted plants as a way of easily differentiating between roots in the pot, and roots in the air. But it is very important to note that these roots have very different structure simply because they are grew in accordance to the environment around them.
So the answer to your question is that all the roots on your plant are just that: roots! They just happen to be roots that are more used to a breezy environment.
The fact that they have new growing tips is good, they'll be able to tailor themselves to their new environment.