GLASS is aimed at making multi-vm/remote-vm development easier.

GLASS uses continuations for debugging stacks from remote servers...when an error is encountered, a continuation is snapped off and stashed in an ObjectLog (a persistent collection). At the developer's leisure, she can bring up a debugger on the error stack in her development vm.

If you are debugging in a development environment you can proceed from the 'remote continuation' and the newly rendered page will show up in the browser...