When we talk about mesh coming to Second Life (which is already here in early Beta, and should become standard through the grid very soon), we usually talk about it in terms of standalone objects. Veteran content creator Damien Fate, however, has created a very cool illustrated guide show how mesh will alter virtual fashion, and all the ways it is superior to prim-based fashion. For instance, mesh-based clothing can bend with the avatar body, and details can be physically modeled (as opposed to being simulated them via textures.) But wait, there's more!
Update, 12:35PM: Damien also made a demo video of this mesh tech: