What would be the motivation to build those cylinders? Traditionally people ventured into new places in hope of getting return of the effort and cost of the journey. Here it seems like you need to invest a lot, just to survive in emptiness.
1. It may well be the only feasible method of interstellar travel. Accelerating a spacecraft is a whole bunch of fuel you don't have to carry; and
2. Computing power.
So what would motivate people? Living room. One estimate I've seen is the current population of Earth on a full Dyson Swarm would give each person the equivalent living space of the continent of Africa. Of course you'd probably have a ton more people. It's likely you'd have a quadrillion people (>10^15) with each person having significantly more room than they do on Earth.