Truth is, it is almost certainly possible to replicate the look of your Super8 with digital video of some sort. Maybe not straight outta the camera, but with post-processing it's not such a big trick to match the look and feel of film -- especially Super8. Just add in a bunch of grain, lots of dust, and the occasional hair, and you've pretty much got it!
Thinking of either film or HD as "the best" and the other not worth bothering with is sort of like arguing whether a convertible or a pickup is a better vehicle: it really depends on what you're wanting to do with it.