In many ways, things wouldn't have been all that different! The population of the city, though not near to it's height, was still probably greater than 500,000. The biggest change was the large reduction in monumental building by the state, which by the later date had been fiscally struggling for quite some time. Disused buildings, statues, and monumental works were often 'recycled' by citizens in need of building materials. That said, as far as we know, things like the grain dole (slightly modified) carried on, the baths continued to be used, the aquaducts continued to bring water into the city, and the races and games also continued. Although Rome was not the centre of Roman politics anymore, in terms of size and stature in the empire, it was still a jewel of a city and a bustling metropolis. The major changes would have to wait until the post-sack period of troubles of the 5th century. Only one hundred years later, the city was a shadow of it's former self.