This is the ultimate PowerPC set-up. I am in the midst of partly dedicating a room to displaying my Mac collection, and putting some Windows PCs in the corner maybe. Right now I have all my iMac G3s set up (with a duplicate left out), and I am working on the rest. I still need to clear other stuff to fit a table for my pro PowerPC Macs. However, I took pictures of all of them to show you, even the ones that are on the ground for now. I spent forever assembling five Ikea coffee tables, and have dedicated four of them to housing my iMac G3s... Major sagging of these tables is expected...

I put a rotating/colorful LED light bulb in a lamp and have that sitting in the corner behind the G3s. I will put bright strip lighting behind them as well. I may post the finished product later, but maybe just a video of it on my YouTube channel, 'maccollectorZ'. So I have 12 iMac G3s, three 1990s PowerMacs, a PowerMac G3 B&W, a PowerMac G4, PowerMac G4 Cube x2, a PowerMac G4 Quicksilver+monitor in the box, and a PowerMac G4 MDD. I also have an iMac G4. I have several PPC laptops sitting below the surface of the G3 tables.
I couldn't fit the pictures of my iMac G4, Cube, and 90s Macs. SORRY. Thanks for looking!