The fourth (previous) launch had a simulated booster tower catch where the booster hovered over water.

The Mechazilla tower arms are about the size of the drone ship used to land and recover Falcon 9 boosters.

If the boosters are recovered then 33 of the 39 Raptor engines used for Starship missions will be recovered. This will make The Starship about as reusable as the Falcon 9.

IF the Raptor engines are $500,000 each to make and the engines are half of the cost of the rocket, then recovering 33 engines would reduce the cost per test mission from $40 million per flight to $12 million.