The Cube's failure is due to many factors but good piracy protection is not one of them. People don't buy Cubes because they're not interested in the games it offers or at least they think they aren't as Nintendo's poor marketing has created a lot of consumer ignorance. The lack of ease of piracy might have lost some sales but it's not something Nintendo should focus on. Third parties LIKE a console that's hard to pirate. The Cube being "pirate proof" is one of the things it did right.
If the Revolution has good third party support, a varied game library, a good price, good marketing, and good piracy protection it will be much more successful than the Cube was. I consider piracy protection an essential part of a quality console.