canon wise Hinata wore a wedding ceremony kimono so it's nice to see how she looks in a western style dress.
To be fair they do live in ancient Japan time, it's still a surprise they let female be ninjas in the first place
that is one way to view it even though Kishimoto insists it's somewhere in between ancient and modern to which he really should've done better in expanding the world itself.
Her dream came true
It sure suits well. Her husband think so too.
Ryuma: Hinata, you look so divine in that dress.