Was the Tabernacle and its furnishings a copy of things in Heaven? Revelation tells us that there is a Temple of God in Heaven, and that in that Temple is the Ark of his testament.

Revelation  11:19  KJV


  And the temple of God was opened in heaven, and there was seen in his temple the ark of his testament: and there were lightnings, and voices, and thunderings, and an earthquake, and great hail. 


God directed Moses twice to make sure that he built the Tabernacle after the pattern God had shown him on the Mountain.

Exodus 25:9  KJV


  According to all that I shew thee, after the pattern of the tabernacle, and the pattern of all the instruments thereof, even so shall ye make it. 


Exodus  25:40  KJV


  And look that thou make them after their pattern, which was shewed thee in the Mount. 


The word translated here as pattern could have just as easily been translated model.


  H8403 תַּבנִיתּ tabniyth (tab-neeth') n-f.
  1. structure
  2. (by implication) a model, resemblance
  KJV: figure, form, likeness, pattern, similitude.


Are there any theological suppositions about this?
Hebrews 8:4-5 (NIV)
  
  If he were on earth, he would not be a priest, for there are already
  priests who offer the gifts prescribed by the law. They serve at a
  sanctuary that is a copy and shadow of what is in heaven. This is
  why Moses was warned when he was about to build the tabernacle: “See
  to it that you make everything according to the pattern shown you on
  the mountain.”
  
  Hebrews 9:19-23 (NIV)
  
  When Moses had proclaimed every command of the law to all the people,
  he took the blood of calves, together with water, scarlet wool and
  branches of hyssop, and sprinkled the scroll and all the people. He
  said, “This is the blood of the covenant, which God has commanded you
  to keep.” In the same way, he sprinkled with the blood both the
  tabernacle and everything used in its ceremonies. In fact, the law
  requires that nearly everything be cleansed with blood, and without
  the shedding of blood there is no forgiveness. It was necessary, then,
  for the copies of the heavenly things to be purified with these
  sacrifices, but the heavenly things themselves with better sacrifices
  than these. For Christ did not enter a sanctuary made with human
  hands that was only a copy of the true one; he entered heaven
  itself, now to appear for us in God’s presence. Nor did he enter
  heaven to offer himself again and again, the way the high priest
  enters the Most Holy Place every year with blood that is not his own.


Moses did not build a Temple with walls and foundations of stone. The tabernacle built by Moses was a movable tent. What the Bible meant by a 'copy' is the design and positioning of the items inside the tabernacle. The tabernacle on earth cannot be equally the same like the one in Heaven but it reflected all the important aspects of the one in Heaven. The design and positioning of the items are same but the material and quality cannot be the same. While the earthly tabernacle was temporary, the heavenly tabernacle is eternal. While the high priest had to offer the blood every year, Jesus offered His eternal blood only once which is for eternity.