Can you explain how existing devices are either Friendly or Unfriendly in a sense relevant to that claim? Existing AIs are not intelligences shaped by interaction with other machines, and no existing machines that I'm aware of represent even attempts to be Friendly in the sense that Eliezer uses, where they actually attempt to model our desires.

As-is, human designers attempt to model the desires of humans who make up the marketplace (or at least, the drives that motivate their buying habits, which are not necessarily the same thing,) but as I already noted, humans aren't able to rigorously define our own desires, and a good portion of the Sequences goes into explaining how a non rigorous formulation of our desires, handed down to a powerful AI, could have extremely negative consequences.

This is only relevant if AGI evolves out of this existing ecosystem. That is possible. Incremental changes by a large number of tech companies copied or dropped in response to market pressure is pretty similar to biological evolution. But just as most species don't evolve to be more generally intelligent, most devices don't either. If we develop AGI, it will be by some team that is specifically aiming for it and not worrying about the marketability of intermediary stages.