Revelation 4: what's the point?

Phil Moon's points from his morning talk on Heaven:

1. Heaven is a place with a throne - which is occupied! God is in control.
2. Heaven is a place for Christians - the 24 elders are the 12 tribes of Israel (OT) and the 12 apostles of the new, symbolising all God's people for all eternity. We will be there. It is our destiny
3. Heaven is a place for God's creation - redeemed, recreated, made perfect. Our world is astonishing wonderful now - it's not half what it is going to be!
4. Heaven is a place of worship. Not just singing (although there is singing). Worship is largely spoken - we are saying to God and each other how great He is.

Slightly strange picture of the scene in Revelation 4. Do you think we're meant to draw this?