NEW YORK ( TheStreet) -- The question isn't whether the Samsung Galaxy S4 is an iPhone killer, but whether it's a smartphone killer. The South Korean tech giant's uber-hyped smartphone got its long-awaited curtain call last week at Radio City Music Hall. Samsung's mobile chief, J.K. Shin, was clearly borrowing from Apple's playbook with the splashy New York launch, channeling the late Steve Jobs' theatricality and getting in Apple's grille by positioning itself as the true mobile innovator. And the buzz was that Samsung may have finally built the Apple ( AAPL) smartphone slayer it has long yearned for since Apple reinvented the category in 2007. "Innovation is what will get consumers to buy new devices," was Shin's line to The Wall Street Journal. "I don't dwell on market share numbers, but I'm not satisfied with our market share in the U.S." But if this is supposed to be the tech fight of the century, Apple vs. Samsung is a boxing match in which both fighters are on track to collapse from exhaustion. The companies operate in an increasingly brutal smartphone market in which true innovation gets more difficult and expensive with every launch. We've seen this show before Unless something blows up after long-term use, the Galaxy S4 is without question an awesome device. Its by-now-signature 5-inch diagonal high-resolution screen sets the bar for portable displays. The camera is extraordinary for a smartphone with 1080 megapixels -- there are two cameras, in fact, front and rear-facing. I was impressed by the touchless, voice-activated features. The battery has roughly 20% more capacity than its predecessors. And in an interesting reaction to rising security concerns, its Knox security suite allows users to essentially run a work and personal version of their phone. Still, it didn't take long for investors to swing from pre-launch excitement to dissecting the very limited potential of the S4 as a market game changer.