I don't really see it. I mean, I get the techy lines remark, but Transistor artstyle felt really vivid and "concrete", whereas Gris has a more ethereal feel - probably because of the watercolor/pencil mix and the pastel color palette.
Reminds me a bit of what a 2D Journey might look like. Have any interesting gameplay conceits been revealed so far? (hearing it's got Japanese devs on the team gives me some hope the gameplay won't be an afterthought)
Transistor has very sharp, vector art style art. This is scratchy pencilwork combined with watercolour paint shading. Transistor has a character whose design is basically techno-norse, this has a character whose design looks like traditional Japanese stuff. It's also got a different perspective, and as you note a different palette. Also it's not Journey's colour palette; Journey used very saturated colours, most of this is pretty desaturated. Also Transistor is boxy in its world design and this has much more organic curves, except for the use of triangular primitives, which Transistor doesn't use.
Even setting aside the palette, I don't see any connection besides a female lead.
Very interesting. Gorgeous art. There's an artist that the the video's aesthetic reminds me of that I can't think of, but it does vaguely remind me of Kandinsky's Bauhaus period in the geometric forms and color palette...
It does seem in general, both in environments and the character design (rather Erté!) inspired by 1910's-30's art styles, or at least there seems to be some through line for the creators to that period.