Yeah, agreed (for the most part). The only time there's any hassle involved is if you have to rip the DVD first - since they're copy protected, it takes ages to fiddle with those. Its pretty straight forward (thankfully), it just takes a long time.
And of course, you'd need 4gb free on your hd for most films. Which is always a little hard to come by. There are proggies to rip a DVD straight to DivX (i.e. you don't need 4GB free) but I've never got the hang of them...