
This is more about game piracy, isn't it?
If they have a proprietary BD format for games, and can alter the drive to read it, then how are pirates going to download and burn that image to blank media?
All the hacks to Wiis I'm aware of hit the DVD drive, and "fixed" it so that it couldn't tell any more what was an orginal game bough in a white box, and what was a DVD-R with a disk image burned to it. Nintendo faught it, but the firmware on the chips in these hardware hacks just got updated and the pirates were off again.
So Nintendo get to have more storage for the games - and if the graphics chips are that good, they'll need that for all the textures - which BD gives them. And they also get to screw the Pirates at the same time. Maybe they've turned round the motor, so it spins the disk the other way, or reads from the outside to the inside instead? Put the disk ID data on the outer edge, and writer software on PCs is screwed.
Your hardware then can't read any other media, but as you say, is that really a loss? Just don't sell the Wii U as a BD/DVD player. And kill piracy without some pretty major work by the pirates at the same time. HAve they said the Wii U is backwards compatible to the Wii?
Win-Win for Nintendo and the games companies?