Some people here probably saw these before but I stumbled across them and I thought readers of this thread might find it interesting, the known computer chassis manufacturer Silverstone came up with two "retro case" designs, tower and desktop, respectively. Faux 5,25" drive covers, turbo buttons, Mhz display and everything.
I couldn't find their tower design in the product lineup and it also isn't sold yet. IMO not bad, I do think the 5,25" floppy drive covers are a bit much, though. There's currently a trend of "retro looking but modern" PC hardware going on with these chinese manufacturers. Started with keyboards, I think. It's perfectly possible again to have a full beige desk setup, down to a potential game controller.
For people who have old PC mainboards (Baby AT) but no fitting case and have their gears turning now - yes, even though there's no explicit compatibility, often AT boards do fit into ATX cases.