Arjuna turns rhetorical. It is not really a question — it is an argument in the form of one. Why would anyone not bow before You? You are greater than Brahma, the creator himself. You are the original source from which even the creator emerged. The question answers itself.
Then Arjuna reaches for the highest philosophical language he knows: 'Sat-asat-tat-param-yat' — that which is beyond both being and non-being. This is the language of the Upanishads. 'Sat' is existence. 'Asat' is non-existence. And Krishna, Arjuna says, is beyond both. Not simply the sum of what exists and what does not, but something that transcends the categories entirely.
The addresses pile up — Mahatman, Ananta, Devesha, Jagannivasa. Each one is a window into a different aspect of the infinite. Great Soul. Boundless One. Lord of all devas. Dwelling-place of the universe. Arjuna is circling something too vast to capture in a single name, so he keeps offering more, the way a person describing the ocean might speak of its depth, its breadth, its color, and still feel they have not said enough.