Yes, deploying Windows Server 2008 Terminal Services is the cheaper solution which can give citrix like functionality at a fraction of a cost of equivalent citrix solution.

Let's see what are the different types of roles available for Terminal Services in Windows Server 2008 first. There are five roles:

1. Terminal Server - TS enables a server to host windows-based programs or the full windows desktop. Users can connect to a terminal server to run programs, save files, and use network resources on that server.
2. TS Licensing - TSL manages the terminal services client access licenses (TS CALs) that are required to connect to a terminal server. You can use TS Licensing to install, issue, and monitor the availability of TS CALs.
3. TS Session Broker - TSSB (formerly session directory) supports session load balancing between terminal servers in a farm, and reconnection to an existing session on a terminal server that is a member of a load balanced terminal server farm
4. TS Gateway - TSG enables authorised users to connect to terminal servers and remote desktops on the corporate network over the internet (YES, OVER THE INTERNET)
5. TS Web Access - TSWA provides access to terminal servers through a web browser or sort of like citrix application publishing over the web.