Having not read the article they're referring in GT Time, if Shigsy sais something like 'It's a shame the Wii U will never live up to its potential', that's no one's failing but theirs... it's not third parties, or the publics, or tablet etc... Nintendo never supported it with any games that demonstrated the hardwares potential, and they were so slow to bring games to the system.
Referring to GT Time again, yes we can all hope 'Nintendo are developing their big franchises for NX now'... but with the lack of these at the Wii U's launch, and the recent story about them not having started on a big Metroid game at any point, I honestly wouldn't bank on anything.