What is the ceiling height?

What is the height of the soffit from ceiling to underneath?

could do the following:

match the cabinet height to soffit

or

open shelving in the corner that come around until pass the soffit then put taller cabinets with top filler then crown up to ceiling.

or

build a similar soffit on the stove wall to have a continual height line around

Is the window on the left set at the same angle as the window on the right?

Is there an equally sized/shaped blank wall on the right as there is on the left?

Are there light fixtures recessed into the soffit over the bay window?

If there is symmetry to the wall above and beside the windows, consider embracing the feature and creating an accent wall there -- perhaps even outlining the area with vertical trim between ceiling and countertop after painting the area, including the ceiling curb/soffit your favorite color.

what is in the soffit? just electrical for the cans? why not remove it?

if you leave it, I'd prob take cabs to ceiling, you could jut down on the right, or just do shelving

Just do no cabinets on that wall they will never look balanced anyway