The way it was picturized and focused on, indicates the future of ShiVika. They will be equals, who will be rock solid support for each other, if at any point one fumbles the other will hold him/her up. If you noticed, when they stuck together Shivaay gestures Anika walk first, it may be a simple gentlemanship but it could also be a hint of their future where Shivaay will let Anika be as independent as she is now and peruse her dreams.
The walk also symbolized that together they will hold the Oberoi family tight. Right now it's Shivaay who is the pillar that holds the Oberoi family together, Anika will be the pillar of this pillar.