Just as Apple made the Music and Videos apps separate in iOS 5 (so all devices were consistent), and iTunes U got its own app, Podcasts may get their own in iOS 6, according to All Things D’s Peter Kafka:
People familiar with Apple’s plans tell me that when its new iOS 6 software becomes widely available this fall, podcasts will have their own app, where users will be able to discover, download and play them on mobile devices. Users who access iTunes via laptop and desktop machines will still find them in that version of iTunes, though.
I bet the icon will be similar to the one on the Apple TV. Although I’d hate to see a complete duplication, if I’m required to keep this icon around, they might as well make it as good as Instacast.