I think the PC you are referring to is more close to the IHC he is talking about than his version of a PC. Remember the PC back in 1993 was two big gray boxes weighing 20kg each. Not a slim 13" macbook pro laptop.
More to the point, the PC of 1993 had almost all its data and functionality stored on its internal disk while a current PC relies far more on data and programs stored and running remotely. In 1993 we would be having this discussion through software written by AOL communicating with servers owned by AOL. If we decided to use software provided by different companies we'd not be able to even have a discussion.
Now, if I want to do something computationally heavy, I wish a computer (or a thousand of them) into existence, built from pieces I rent from a company such as Rackspace, HP or Amazon. My data, while existing locally, is also mirrored on several different places, accessible by almost any computing device connected to the internet, regardless of maker or software. Last time I lost a notebook computer, I was able to restart working on the next business day from the point I left (minus one commit I failed to do before leaving the office).
