IPMI is fantastic, so long that the understanding is in place that access to your IPMI vlan may as well be considered root access to the node. BMCs tend to be pretty miserable when it comes to security. It's generally a good idea to have ACLs in place to ensure BMCs can only communicate with a secured management node, and importantly that BMCs cannot communicate with each other.

Normal users can be sold on the idea of devices talking to each other (though in the case of Bluetooth I'd say it may have soured them on the whole thing). But I'd still say that even convincing a non-dev that wake-on-lan would be handy for them is a stretch, let alone more... Also I'm not sure how much evangelism is really appropriate - I may think that shelling into my headless server at home is great, but if you are happy with just cat videos, who am I to say you need to do more?