Why not, Most sockets are away from places where you could kick or knock it. And I think it would be great for items that you need to take away. If it does break you just turn the socket of and you have no issues.
Also fuses don't get hot, so I don't see why you wouldn't use it with heavier equipment.
Small chargers often use part of the space of the actual plug "footprint" for the transformers/electronics (and even then can get quite warm).
The new plug design won't work for that sort of thing, it'll mainly be of benefit to devices with a plug on a cable separate to the charger, for which there are already workable (fairly robust) alternatives (the figure 8 connector that the likes of Sony, and canon use to connect the transformer block to the mains plug, or the style divosuk posted for "on plug" transformers), or for light duty fixed appliances (where space isn't really an issue).