Upgrade from Ac68u to AC5300 worth it?

Hi All,

Im planning to upgrade my main router which is an AC68u to and AC5300 U. I have lot of walls in beetween rooms and have setup another AC68u as ac access point to counter this in the bedroom.
Would the AC5300 improve things over the 68U. We use 4k Metflix, Ipads, Iphones, ps4 and 4k media streaming.

Thanks

Sunny