their investments is into a later for x64 to arm cpu translations, but still does not settle the problem that the gpus on arm based systems still have soo little development into games, which would then limit your options to amd, intel and nvidia based arm designs if you wanted an SOC with existing GPU support already in the environment. the moment you choose to have a tiled approach of mixing cpu and gpu from companies, you sort of instantly throw away the efficiency gains from switching to arm in the first place.

AMD and intel basically havent pushed out an atm based device yet, and Nvidia notoriously hates doing semi custom designs for clients.

personally i think youre far more likely to see the arm compatibility layer for basic pcvr games on a theoretical index 2 before a steam deck uses arm.