Nintendo says there are enough devices that serve that purpose already.
Microsoft and Sony have some big plans for their systems. Sony packed Blu-ray capabilities into the PS3 and added 3D support, while Microsoft was the first to add Netflix streaming and may even allow customers to watch TV on their systems. Both companies see their consoles as all-in-one devices that you can use for all of your entertainment needs.
Nintendo is different. They were the last to add Netflix, and though you can hack your Wii to play DVDs, it doesn't do so out of the box. The Wii U will be no different - Nintendo's new high-def system won't play Blu-rays or DVDs.
"The reason for that is that we feel that enough people already have devices that are capable of playing DVDs and Blu-ray," says Nintendo. "It didn't warrant the cost involved to build that functionality into the Wii U console because of the patents related to those technologies."