The book of Exodus ends with worshiping the Lord. This makes a very important point – the end of the book is not getting into the Promised Land, but worshiping the Deliverer. The Lord has freed them from slavery – not just so they can get what they want, but so they can worship Him, know Him, follow Him, be changed by Him.
This is a point I often miss – I want to obey God and follow Him, but so often I am so busy “doing” things for God, that I miss the wonder of just being in His presence. Moses is busy preparing the Tabernacle, a good thing, and then God shows up so powerfully that Moses can’t work anymore! The cloud of God’s presence descends, and His glory appears in such a strong way that everyone leaves. They are free, and can know God, and can be His people, and worship Him.