Not me. I said it was probably before.
Are you implying that building with metal roofs are made out of a single sheet? Because that is flat put wrong.
1. There are multiple sheets of metal used. This allows smaller pieced to be replaced for cheaper should something happen.
2. The reason you don't see roofs of shingles in large pieces is because they are EXTREMELY brittle. Look at them the wrong way and they will break on you. Metal is very malleable and allows you to have larger pieces.
Now onto similarities.
1. Both use stone of of the same color of their surroundings.
2. Both have rounded dome-esque tops.
3. In the lower left of the screenshot you can see what what appears to be writing on the stone. This appears to go hand-in-hand with what is seen in Morrowind.
4. The roofing in Skyrim appears to be made of a material similar to copper. This is derived from the bronze-ish hue, and the tarnishing to green.
And one other thing...
Where in God's name are people pulling that these are "Tolkien Elves"? Architecture does NOT denote the appearance of a people. It is however VERY much decided by the climate. In tropical areas structures are build lightly. Typically from local trees, bamboo if it is available. In cold climates they are built heavily, and using materials that enlarge/shrink from the effect called "thermal expansion" minimally. In otherwords, things like wood and stone. Metal however is effected greatly. That's one of the reason why bridges have gaps between sheets of metal, so that the can enlarge and shrink without buckling the bridge,
I especially like that they weren't called the same, Dunmer/Dwemer/Altmer/Bosmer/Daedra/etc... it just sounds so refreshing. But from Oblivion onwards they gave them more generic names like Dark Elves, High Elves and Dwarves. Just like every generic D&D/LotR fantasy out there. Sure, you could still come across the odd reference to their old names in books and such, but in the game itself they went by their new generic names
You might want to replay Morrowind again. Because as I recall they were called High/Snow/Dark/Wood Elves/Orcs. Even the Dwemer effect by corpus was call "The last of the living dwarves".
EDIT:
Also, unless I am mistaken it is a habit of humans, Imperials specifically to call the mer races by their "elf/orc/dwarf" names. So it would only be naturally that in the home of the Imperials you hear it more often than not.