Just by adding a "curved edge/edges" to your stair
can add style and can also take the blandness off a straight flight.
Although you do not get a sweeping soffit,
the curved edge of the Stair, still creates that sweeping feel.
Your staircase can be finished with all products,
including stone, marble, tiles, wood and carpet?
You may even chose to leave the stairs in their "raw" form.
You might even like to add a solid concrete balustrade.
The picture above has a closed string for the balustrade to sit on.