Yeah - the brain replacement stuff is already happening in a very minor way with cochlear implants and the like.
Apart from the technical difficulties of uploading there are a lot of questions on what you'd actually want to do and why. Just having a simulation of you running on some box or a copy on Github might seem a bit pointless and I'm not sure many people would want it.
I've thought of a couple of possibly practical things. Firstly for the benefit of the friends and relatives remaining alive it might be nice to chat to a version of the person who's biological body has packed up. This wouldn't even require uploading in the manner of scanning the brain. It could just be an AI that was good at method acting and 'becoming' the person in the way that a human actor can. I'd quite like an ongoing version of my gran for example who I could chat to. I guess more of a skype type chat than a robot.
The other thing is death is annoying for the creation of art and similar stuff. It would be cool if there was an ongoing version of Beethoven say cranking out new symphonies. Also personally it would be nice to work on intellectual stuff that exceeds what I can do in a biological lifespan. I guess if the AI seems conscious at least as in being aware of stuff and interacts normally with people who are conscious in the normal biological way that's probably enough - it doesn't really matter what the philosophers think of it.