Alongside Windows 8.1, Microsoft released a rather useful app for iOS as well today. Microsoft Remote Desktop allows you to access and control your Windows PC from your iPhone, iPad, or iPod touch. It looks like a rather decent utility, especially for business users, as plenty of similar apps have tried to pull off the same function with less simplicity.
With the Microsoft Remote Desktop app, you can connect to a remote PC and your work resources from almost anywhere. Experience the power of Windows with RemoteFX in a Remote Desktop client designed to help you get your work done wherever you are.
•Access to remote resources through the Remote Desktop Gateway
•Rich multi-touch experience with remote desktop protocol (RDP) and RemoteFX supporting Windows gestures
•Secure connection to your data and applications with breakthrough Network Layer Authentication (NLA) technology
•Simple management of all remote connections from the connection center
•High quality video and sound streaming with improved compression and bandwidth usage
•Easy connection to external monitors or projectors for presentations
Microsoft Remote Desktop is a free for iPhone, iPad, and iPod touch users in the App Store.
Update: Microsoft introduced a version for Mac as well for OS X users to control Windows remotely.