It's not at all the market this is aimed at, but movement in the direction of obtainably-priced new PPC hardware is exciting to me because it means that there's

It's not at all the market this is aimed at, but movement in the direction of obtainably-priced new PPC hardware is exciting to me because it means that there's new hardware that can run classic Mac OS closer to the metal — potentially very close with a thin hypervisor layer that bridges the gap between what Mac OS is expecting and how the hardware actually is. As for why it's exciting, emulation of classic Macs still has large holes (e.g. GPUs aren't emulated well enough to support 3D games) and is generally buggy, which will be a problem when all the old PPC Macs have broken beyond repair. A vast amount of unique software will be rendered not practically usable. There's also just a little bit of something lost in emulation… all the bits of added latency and quirks pile up to dampen the positive aspects of those old systems.