Very nice work, but Microsoft did a pretty good job with their RDP clients, and making them for OS X and of course Windows. I'm not sure what the draw is for a web-based RDP client.
Others have alluded to this elsewhere in the comments, but the draw is that this is a programmable rdp client in Node.JS. You can use this to write host scripting code, you could use this as the basis for something like Screenhero, etc.