Laurefindel
Legend
I think it's the word "steam" that leads to confusion, insofar as Eberron is a steampunk/steam fantasy-setting-but-without-steam. I find it closer to gas-lamp fantasy but this is neither here nor there; a "non-victorian steam fantasy setting but without steam" actually describes Eberron pretty well to the non-initiated.S'why I said "Steamfantasy"
And while it is a hard-magic version of steamfantasy, they've got trains and noir detective stories, and a general vibe that fits the concept of steamfantasy even if they don't have the gears and widgets for the aesthetics of steamfantasy.
I guess you could call it "Magitech" instead, but that doesn't encapsulate Sharn's style, either.