Console manufacturers don't want consoles to be usable for general-purpose computing (e.g. web servers and supercomputers), because they're selling at below com

Console manufacturers don't want consoles to be usable for general-purpose computing (e.g. web servers and supercomputers), because they're selling at below commodity prices (as a loss-leader) and making them usable for G-P C would just cause everyone to buy them until they raised in price to commodity levels. This has happened previously, with PS3's OtherOS feature, so it's a very real concern.