Since your tablet is running Windows 8 and not Windows 8 RT the fact that it's a tablet is not really relevant here. Same goes for Windows 8, likely anything that works for Vista and 7 will work for 8.
With that understanding, this answer that suggests tricking Windows into creating a virtual monitor, and then using a VNC program to view it should do fine. The VNC program would run on your tablet.
ZoneScreen appears to implement this as a turnkey solution, and might do what you want:
![ZoneOS](../../I/static/images/76572b72e3f4ae52f766ab7ab3de4f20f67da2930fb4a6851228e3dc3272820f.png)
But caveat user:
Please keep in mind that Windows 7 support is strictly experimental. You are trying it for your own risk. Certain users have reported Blue Screens (BSODs).
Any known solution for Windows RT ? – MartinB – 2013-05-06T16:30:30.000
@MartinB ZoneKey seems to wrap it all up as one package. There shouldn't be anything stopping you from finding a virtual monitor application and VNC server for Windows and putting the pieces together yourself. – ta.speot.is – 2013-05-06T21:56:58.177