When the Nintendo DSi launches in the US on April 5, 2009, it'll be extremely close to three years since Nintendo released the Nintendo DS Lite. Three years is nearly an eternity for an electronic gadget – heck, Apple seems to update its hardware almost every year. And that's exactly what the Nintendo DSi is – though it touts brand new features, it's not a brand new system. It's more an upgraded model of the existing platform. The iPhone 3G to 2007's iPhone, if you wanted to compare its direction.