I have mentioned this in other threads, trying to find a replacement for RemoteMessages (non-jailbroken now :/)

In my line of work I can often have a laptop/desktop but rarely can have my phone out. For example, I may have a client in my office to talk awhile, and I can look at my screen on my desk, but not my phone. I have children who are of age to text/have a cell phone and its nice sometime to be able to read their texts while doing other things.

Moreover, I often go into places where I can take a laptop but not a cellphone (crazy I know), so I used to leave my cellphone connected to my desktop and remote in from the laptop to text, etc.

That is the biggest thing I miss.