And Samsung still has incorrect and overblown colors on its amoled screens despite burning your eyeballs brightness.
No phone is perfect and I would still pick the g3 over the gs5 because Samsung has lately been locking down the bootloader (no root), and the new LG skin on the os is much more minimal.
I am not interested in the HTC. I don't care about the phone being what is IMO too large, to accommodate the speakers.
You can't go wrong with either phone, but the above aren't particularly good reasons IMO to pick one over the other.
Movie mode on current Samsung phones is pretty competitive overall in color calibration save Apple. I don't think any current flagships are particularly good in this area except for Apple and the Nexus 5.
And root is available for all US variants of the S5 as of several days ago.