It will definitely change job markets. I see driving for Uber as a "UBI" in the sense that it allows you to make money if you have a car and know how to drive (I know not everyone can front that money, point is just for illustration). Now what has happened to the broader labor market? Well, if you don't like your minimum wage job at present, you can always drive Uber (and at any time you want at that). That would make crappy jobs have higher wages (for the sacrifice in flexibility, intensity of labor, etc) and I think that's fine – it's just the market correcting for the alternatives people have to make money. I think actual UBI will help motivate us automate these mundane repetitive tasks in the long run that we currently employ humans for. Although there is still a lot to do, eventually people will have the choice to do repetitive, laborious work. Instead, they can focus higher level creative work everyday for something they enjoy.