The popular depiction of AI in popular culture is almost always based on some hardware, it's always a machine, more often than not humanoid. But that obviously comes later, the robotics aspect of AI will not come first, the first AIs will be software services, basically. They will deal in information.

It's not blue collar jobs that will be the easiest to automate, it's the service and administrative jobs. No need to build hardware for most of this, it's IT infrastructure for the most part. The hardware for the rest is already available in people's hands, literally.

The information jobs will be far easier to automate than the manual labor. It's not the janitors who will go first, it's the accountants and other jobs that deal in information.

Then again it will mostly shift software development jobs from having less to do with chasing obscure bugs and more with what's actually important: their usefulness to people, their design and function.