I don’t know. I think Calvin was responsible for throwing out most of the liturgical bath water and the baby with it, when he centered worship almost exclusively on the singing of psalms and a huge commentary of Scripture, and eliminated everything he thought grounded in tradition rather than in the Bible (IIRC, in La forme des prières et chants ecclésiastiques – no idea of how that was translated into English –, there is an invocation, a long introductory prayer, a long intercessory prayer for after the sermon, a blessing, and that’s it). And I am pretty sure people had better dress up for church – albeit in an appropriately dark and sober attire – in Calvin’s Geneva.
I also know a number of monasteries where dressing up is not even a concept, wether the monks and nuns wear the habit or not, and whose liturgy is breathtakingly beautiful.
Maybe it’s just me. If I am honest, one of the reasons I prefer not to dress up is because I am prone to being judgmental, and not wearing my Sunday best helps me not to look at and criticize what other people are wearing. In my own church, as long as I am still a pastor, what I wear doesn’t matter anyway, as I vest for service. At mass, I am content with being clean and modest. And I am a liturgy lover, both as a celebrant and as a faithful in the pew.
My pastor husband, who feels much the same as I do on this issue, once told somebody “I will wear Sunday best on my body the day I manage to wear Sunday best on my soul”. That sums up what I try to do too. When I read the parable of the king who marries his son and throws out a guest who wasn’t wearing a suitable dress, I don’t think of my clothes. I think of my heart, and I am glad God is merciful.
That said, I totally understand how changing clothes can help someone getting into the right disposition for worship. It just doesn’t seem to be helping me very much. The only piece of clothing I own which has a noticeable effect on how I approach the upcoming liturgy is my alb, because when I wear it, the person I am gives way to the function I have to fulfill.