What was great about the Amiga was cutting edge multimedia hardware, a powerful user-friendly operating system, and a community that encouraged both professional and amateur developers. On hardware, I don't know that passive cooling is important: it's very difficult to be passive cooled and remain cutting edge.
In that sense, I think the Nintendo Wii is the most Amiga-like console. PowerPC processor, onboard graphics co-processor, backwardly compatible with its predecessor, takes advantage of technology (Bluetooth, SD), friendly OS, and even supports emulation of old systems directly. There's even a joyboard peripheral!