It's kind of hard to tell with the folks in the picture above; it's a different era and thus a different aesthetic. If one were to copy it today, he would look Victorian and thus out-of-place.

I stand by the view that a modern kilt should be somewhat "stereotypical" and thus be in a tartan (at least, if you're not constantly surrounded by kilties or are are Hollywood or royalty and thus can be a trendsetter). You want your kilt to impress them but not truly distract them. A tartan kilt is something that 99% of folks are at least familiar with in passing; a pattern like a suit uses is, wrongly or not, going to make them think you're a cross-dresser unless they already know you and are familiar with you wearing kilts.