But for those not in the top-layer its going to be "welcome to the precariat" [1]. Constant hustling, unpredictable income and housing, moving-on a lot, fewer social ties. For those at the bottom it's zero-hour contracts driving for Uber and stacking shelves at Amazon fulfilment centres.
Traditional full-time jobs provide a lot of the security necessary for long-term commitments like raising children, educating them properly (so that they in turn have sell-able skills), and engaging/participating in society. When almost everyone is chasing the next contract to pay the rent, the result can be a hollowed-out society where we all end-up poorer.