Yeah, no. Take a good look at 2:47 - that's not 617 MB free, that's 617 MB used, right? By scrolling tabs by 2:51, that took a short pop up to 628 MB used.
The phone showed that S-voice was the only user task available to the user to kill. Not at all different than the HTC task manager in that regard - the phone was running in the background, messaging, the laucher, all sorts of other goodies and the operating system services on top of that.
Having an even extra 100 MB available on the international SGS3 is great, no doubt about it, but if I'm right about the memory allocations for the S4, you won't be getting 780 for the user out of 1 gig, you'll be getting closer to what the LTEvo has.
So, if true, then idling S-voice and no other apps would put you at about 628/680 MB, or let's say 60 to 100 MB free. I can eat that much opening several tabs of this site in Boat Browser. (I have been exceeding 100 MB of ram use just for web pages nearly every day for nearly a year.)
Hence, when running large software stacks, more ram is better.
Again, I'm not knocking the Sammy for needing more ram.
Android is no different than any other PC - as the OS advances, as apps advance, as the devices include more features, you need more memory.
I'm wishing that HTC would have provided more as Sammy did, it's the smart play. Meanwhile, if I'm keeping the LTEvo, I'm debloating it - no choice for the way I use things.
PS -
SK Telecom