Could optimizing the Wii U OS free up more RAM for games?

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At present, the Wii U's RAM is split in half; 1GB for the OS, 1GB for gaming. While this is still more than twice as much as the PS3 and 360 have available for games, more could be a big help as games continue to become more memory intensive.

Over their lifespans, the Xbox 360 and PS3 had more RAM freed up for games by Sony/MS optimising their OS's; could Nintendo do the same with Wii U?