Vince,
You don't want a large poster of your lady? :icon_biggrin:
All kidding aside, you're right no-one needs anything really bigger than a 5MP, but then you also get bragging rights. :icon_biggrin: And like I said, you can always downsize the photo. You can't really upsize the photo once it's been taken (at least making it clear).
Exact opposite of cooking...you can always add more to the recipe, but you can't take out what's already been mixed.