For me kitsch defines something that stands out in it's overly cliché-looks. Wikipedia defines kitsch as "a term applied to art and design that is perceived as naïve imitation, overly eccentric, gratuitous or of banal taste", and from my interpretation of this definition, kitsch defines a design choice made to accentuate certain artistic elements to create the very typical looks of kitsch. Kitschy designs sometimes tend to represent visions of outdated scenes by gathering key elements together in such ways that they end up looking too much in-place, and make the result out-of-place (if that makes sense). They often also end up looking flashy, boasting lots of bright colors and shiny details. Kitsch can sometimes also be seen as a form of caricature of past or present situation/objects.
WordArt has become easily recognizable in it's primary uses (PowerPoint presentations and technically every Office suite program), to the point of becoming overused and associated to the fact that it was overused. This led to this feature slowly turning old-fashioned. If someone today was to use WordArt in a presentation, it would be immediately noticed as being cliché, or kitsch.
In case you had never heard about WordArt, it's a feature that's been present in PowerPoint for a while now (1991), which allows you to make some cool-ahh text effects. Rather than installing some unnecessary bloatware on my computer, I'm using a web editor as well as some css snippets I stole found here and there to style this article (honorable mention to this website which I found out about way too late). These showcase some features of WordArt, but feel free to try out what PowerPoint has to offer, as the full power of WordArt won't be covered in the span of this article.
Overall, I believe that kitsch isn't (or at least shouldn't be) a pejorative term. The "decay" of WordArt (or anything considered as kitsch) is a chance for a return marked by nostalgia and remembrance. I think WordArt just doesn't fit in today's graphical standard of everything being over-simplified and clean looking (which is a shame), and I've always seen WordArt as the Web revival equivalent of PowerPoint presentation styles. I believe that kitsch mostly means outdated, and that WordArt still has a chance in our presentations.