You pretty much hit the nail on the head. As a Carmack fanboy I have really only been reading things dealing with him. Glad to hear my misgivings are hopefully false.
As a fellow Carmack fanboy, trust that he knows what he is doing. Mobile will be very important as will the PC for some similar and some dissimilar reasons. Imagine how freeing it will be to be in VR standing up or in a lazy boy and be able to use an immersive environment. There are already a lot of battery packs for cell phones with 3 times the capacity of a normal battery too.
So basically both are important and Occulus has the resources to not have to make a choice about working on one or the other.
