Nobody's copying the iPhone and iPad anymore. Back when they blew open those markets everyone was, but since then, they've been all about incremental improvements. I'd make an exception for SIRI, which is a strong piece of AI, but since then, Google has managed to take their own version, stick it on dedicated chips and allow you to use it from across the room. With the 5S's leaked specs, the only thing remotely innovative about it is the biometric sensor and who knows if that'll be game changing.
Looking at the other 5S rumored features... Dual LED flash (something the 920 and 925 have and the 928, 1020, and the Honami have moved past). High speed video (something the Galaxy already had). Larger screen? Taken from Android.
In the tablet market, the Android OEM's pioneered the 7" space. Apple's best selling tablets are now 7"
Who's following who here?
In the 7" space Apple definitely followed but Apple created the entire market in the first place 3 years ago. Yes feature wise there are incremental not so dazzling updates every year since but I would argue Android or MS has done anything better in that 3 year period as well. Google Now is a "me too" version of SIRI. Is it better? Maybe but innovative no. Google followed. I wouldn't comment on the iPhone 5S because rumors are exactly that, rumors.
Innovating every year is hard to do. You also have to milk that cow once you create a new market. Realistically, does it make sense to redesign a device every year from a business perspective? No, you need to get your R&D money's worth.
Android, Samsung and Microsoft are all incrementally improving their products as well. Heck, other companies react based on Apple rumors. Look how everyone is making a watch now. I'm really surprised anyone is questioning Apple's creativity and innovative chops.