Don't get hung up on the numbers Apple's iterations haven't always been as overtly dramatic, but they have been big strides forward (even the 4S rolled out major improvements to the CPU and camera, and introduced Siri). The company was the first with an ultra-sharp display, built-in natural language voice search, a 64-bit mobile processor (though ARMv8 is the meaningful gain right now) and a fingerprint sensor you'd actually want to use... I'd say those are big achievements.
Thats just it thought, you're tallying up achievements from years ago, and comparing it to what Samsung is doing right now, which is what always happens in these comparisons. (Because it's basically all that can be done). Apple gets endless *ahem laurel-resting* credit for things like Siri (never mind I was using Google voice commands a solid year before that) but we're all supposed to not count that Samsung has bigger displays, higher resolutions, Wacom pen integration, power user features like removable battery/expandable storage, etc.
Samsung has spent a lot of time coming out with features many actually care about. Apple has as well, but be honest, it hasn't been fast and furious, it's been slow and plodding.
I love how Samsung takes flak for a phone like the SGS5 (I personally would have one any day of the week compared to last year's itty-bitty phone) but Apple's incremental upgrades get stacked in the 'major innovation!" column. It's like I say- they ONLY are tallied that way, because Apple isn't exactly spoiling anyone with regularity.
I do want more from Apple, but you've got a somewhat selective memory of who's innovating what. Remember, the Galaxy S and (to a lesser extent) S II were deliberate copies of Apple's overall design language and interface.
This has all been hashed over a million times- Apple's done plenty of deliberate copying of its own, it's just that once again, since the expectation bar/update frequency from Apple is set so blazingly low, those too get stacked high in the "major innovation!" column rather than greeted with "meh."
(see the GS4's eye scrolling or the GS5's already wonky fingerprint sensor).
Wait, wait, let me guess. The iPhones never-wonky, perfectly working "AMAZING! REVOLUTIONARY!" fingerprint sensor gets gold stars and top place in the major innovations' column, whereas we've already declared Samsung's a failure. Sounds about par for the course.
At any rate, the point is that it's difficult and unrealistic for any company to completely overhaul its flagship device every year. To pretend that Samsung is somehow immune from that reality is just as naive as a die-hard Apple fan claiming that the iPhone doesn't need a screen bigger than 4 inches. The GS5 looks like it should still be a nice phone in many respects, but we're going to have to accept that it's not a game changer for anyone but fitness junkies.
I think you simply missed the point- you're RIGHT about constant overhauls being unrealistic. Where you're missing it, is the reason its taken differently when its Samsung. Fans of Samsung don't expect to wait several years for a Galaxy 4S, they've come to expect an actual upgrade worthy of a full model number bump. (And STILL not wait years for it). IN Appleland, ho-hum S updates to the same model number are expected... no wait.. they're MAJOR INNOVATIONS, I forgot.