The upcoming flight is planned to be the first to send Starship into orbit around Earth. Flight tests until this point have intentionally flown passively safe suborbital trajectories. By going to orbit, the next phase of developing Starship to be fully and rapidly reusable can begin.
This will also mark the first time Starlink V3 satellites are planned to deploy into the constellation — 26 satellites, ~10× the capacity of a Falcon 9 V2 mini launch.