I'm not an architect, but I really enjoy modeling buildings and structures. I'm looking forward to using Carrara's sub-surface-scattering for realistic lighting on marble, alabaster, "people" or other semi-opaque materials.
I also have plans to utilize the translucency for an added element of realism to plant models. If Patrick 210 will forgive me, I would cite his "Palm Island" as an excellent example of how "real" this enhancement can make vegetation look.
The displacement map function will add a lot of detail at render time too. I don't believe even Vue Infinite has all those features yet, but I'm sure they will be added eventually, after all, Vue is Teaming with ILM and I'm sure some cool plug-ins and features, (and stability) will be added as a result. I considered both apps and did a lot of research before my purchase decision due to tight budget constraints which unfortunately precluded owning both apps. For right now though, Carrara gives me more features in Carrara5, let alone Carrara5pro, and at less than half the price, (actually, a quarter of the price for C5 with the current sale) for making a realistic close-up render. Don't get me wrong, I'd love to have both apps.