According to the source, "This is designed specifically to allow developers to tweak player behavior, perhaps urging players to check out specific areas of a game or get past a difficult spot. "Next-gen achievements can also be tied to broader events, like a weekend challenge or a communal goal, like contributing a set number of kills to the bigger goal of 10,000 kills over one weekend."
The rumored HD space of the next-gen Microsoft console is reportedly 500GB, allowing it to have enough space to rip videos. However, most DVR devices feature 1 or 2 TB hard drive capacity, so the machine may feature the same.
The PlayStation 4's DualShock 4 controller will have a Share button that provides a similar function.