Several physician offices in our area lost power over the weekend because of heavy winds. A few of them are currently using electronic health records (EHRs). Can you still function if your power goes out? Probably not. However, at least you can still maintain some level of productivity while you wait for the power to come back on.
If you're relying on an Internet connection, you can still access your EHR if you have a 3G wireless card for your mobile computer. Everyone should have some type of backup Internet connection and a 3G wireless card is a very practical option. So, if you're still trying to decide between a desktop/workstation (along with an uninterrupted power supply or UPS) vs. a mobile PC like a tablet or laptop, think about power outages.