Microsoft promised that it would put out a Remote Desktop app for Windows Phone, and it's making good on its word -- provided you're an early adopter, anyway. The company has released a Remote Desktop Preview that requires Windows Phone 8.1 (which itself is considered a preview) just to run. If all the stars align, though, you'll get fairly advanced remote PC access that lets you perform Windows 8's multi-touch gestures and stream "high quality" media. The folks in Redmond haven't said when the finished app will arrive, but we wouldn't be surprised if it launches after Windows Phone 8.1 rolls out in earnest.
Microsoft Windows Phone 8.1