The four glass screens at John’s wedding make me think of the idea of the, ‘glass closet’. If you’re in the glass closet everybody knows you’re queer but you still haven’t come out. In light of how romantic Sherlock’s speech and behaviour is at the wedding, to have these four transparent screens is very evocative of his relationship with John.
In TBB when Sherlock is attacked at Soon Yin’s flat he thinks that the acrobat is hiding behind a screen. The acrobat is a foil for John with his, 'small strong hands’, athletic build and size 8 feet. As Sherlock attempts to look behind the screen, he is attacked from behind by his assailant. John is not hiding his feelings but he’s not exactly in view either. He sneaks up on Sherlock from behind. I think this is kind of like how Sherlock’s feelings for John sneak up behind him.
Each time that Sherlock has said, 'into battle’, it has been while standing in front of his armoire. An armoire or wardrobe is the precursor of the contemporary closet. Every time Sherlocks goes, 'into battle’, he is putting on a costume that will help him hide who he really is. In ASiB he is pretending to be straight and not in love with John, The Woman sees right through this. In TSoT he is pretending to be a happy, platonic, supportive friend when really he is heartbroken and in love with the groom of the wedding he’s about to attend.
The closet is where it is said we hide our queerness. The closet is where we get our clothes, the place from which we draw our armour, the place from where we choose and attempt to control how we appear to others.
We can change our clothes behind a screen and we can see how this particular piece of furniture can relate to our closets. It relates to dressing and to the image we portray once we’re dressed.
During the story of the stag night Sherlock tells of going to visit Molly and asking her for advice about drinking with John. During this scene I believe that it is finally crystal clear to Molly that Shelrock is gay and in love with John. She sees his collage of John as the Vitruvian Man and understands the truth. She shows her understanding of the nature of Sherlock’s conundrum when she says, 'Urinating in wardrobes, bad’. Sherlock is, 'in the wardrobe’, and doesn’t want to lose control of his penis while intoxicated.
Those screens at the wedding are so unsightly, why are they there if not to symbolise something? If Sherlock planned the whole wedding and he’s a consummate sophisticate with impeccable taste then why these cheesy, horrible screens? They are transparent. They are super dated and look out of place. Maybe Sherlock is transparent in wanted to subtly sabotage the wedding with a passive aggressive move to decorate it poorly? Could be.
I like the idea that they’re the transparent doors to his closet. He’s not admitting anything but not hiding anything. He’s never come out and said, 'John, I’m in love with you’, but, yet, here, at John’s wedding, he’s gushing about how amazing John is after having spent the last several months living just to plan his wedding. Those screen doors, like Sherlock, hide absolutely nothing. But, they’re still there, they’re still screens, meant to obscure something at least in theory. It’s just that his secret is becoming increasingly easy to see.