I think this was missed in all the excitement of a new Windows 10 Mobile build being released to Windows Insiders this past Friday.
The Remote Desktop Services blog revealed yesterday that the team has released a new Universal Windows Platform build of their Remote Desktop app for Windows 10.
This is a very robust update to the previous Remote Desktop app with many features such as default user accounts for remote computers and Remote Gateway acess/management.
You can read the lengthy walk though over at the Test Drive the new Microsoft Remote Desktop Preview app for Windows 10 post at the RDS blog.
In the meantime I have a screenshot gallery here so you can see the app in action.