It’s not as far off as you might think, screen size can be misleading for phone size as aspect ratios and bezels change:
S7 dimensions: 142.4 x 69.6 x 7.9 mm
S24 dimensions: 147.0 x 70.6 x 7.6mm
Mostly it’s slightly taller than the S7, otherwise about the same.
You could also argue the lack of bezels now makes cases more necessary and adds to the bulk too though.
I wonder if valve is planning on bringing the driver level implementation of frame generation to the steam deck as well. Theoretically should be able to support it I think, since it’s an RDNA 2 gpu.