Anti - the provision to take off your shoes back then was to differentiate between regular and holy - to show proper respect to the Lord God creator. But Now, the veil has been ripped from top to bottom and since the sacrifice of Jesus, all are allowed access to the Father. If we are in Jesus, we are pleasing to God. God said, "This is my son, in Him I am well pleased."
You're right - holiness is not now about taking off your shoes.
Jesus said, "Be holy for I am holy"
Holiness is seperated out from this world, "in the world but not of the world," special, set apart for God's glory.