Direct addressing that way seems unfeasible, it would require a extending the IP stack to support direct addressing for it to work, and it already support 128 b

Direct addressing that way seems unfeasible, it would require a extending the IP stack to support direct addressing for it to work, and it already support 128 bit addresses. A far more feasible model is direct addressing through a unique IP, and we do not need a bigger address space for that. That said, considering the current amounts of data Google holds, I could see the theoretical point about unique addressing every single byte they have. 64bit addressing only allow for a single order of magnitude of growth in that scenario.