Can it run Firefox yet? The last time I tried reactOS, it BSODed just trying to launch Firefox... and don't even try using Windows drivers on it, it'll either hardlock, BSOD immediately, or during startup, regardless of whether you're in safe mode or not...
And it has the 2000-era UI and the modern app support.
It's just dragging on other things, such as SMP and 64bit. But development focus seems to actually be focused on precisely these two.