The example application showing a 3D FireMonkey form.
On the other tab is a standard 2D form.
On Wednesday I announced TFireMonkeyContainer, a VCL control that can host a FireMonkey form, allowing you to mix FireMonkey elements into your VCL app. It was (and is) a new project, and the announcement page listed several known bugs and possible future design changes.
Bugs: gone! Design changes: