VPN and RDP is a task you can do easily on iOS (VPN is embedded in system and Microsoft RDP client is very good, and free). There are serious real limits in using iPad+keyboard for work, but not VPN and RDP.
Agreed on that! The iOS RDP app is pretty darn good, and VPN connectivity options are really good too. BUT... I discovered that if I RDP into my work machine/network, it totally negates the need for both Coda and Transmit on my local iPad.