I can get a twin-card for my phone so it's tied to the same subscription and I don't have an iPad. In that case, it makes very much sense to me to be able to us

I can get a twin-card for my phone so it's tied to the same subscription and I don't have an iPad. In that case, it makes very much sense to me to be able to use that twin SIM-card somewhere useful. It may not fit your needs, but in the parts of the world where 3G is way more ubiquitous than wifi, it's very neat having. And it's extra neat to have without the need to bring up the phone and setting up tethering. Dell offers it as an option, just like everything else. I fail to see why Apple can't do the same.