After a bit of back and forth with Bluesound support, I've got an answer for everyone. Right now the updates to the Node N130 FW are in preparation to support the N132 units which is why it recognizes the DSF files on my HDD.
And according to Support, yes, the new N132 Node will natively support DSF files directly through the mobile app, no longer just through the conversion process using the desktop player.
However, they do not know if DSF support will be added to older units.