That being said, the game itself doesn't seem that demanding. My resources say 6-10GB RAM used, 60% CPU and GPU is maxed out, of course.
As for the bandwidth, it seems to be around 0.5-1MB/s downstream for the real-time streamed world and the offline mode eats up a couple KB/s (similar to Elite). They say that this is for telemetry purposes and the offline mode in the full version won't need an internet connection at all, but well... We've heard that before, haven't we...
The game does look like in the trailers, btw. The graphics are fantastic. With a couple of caveats, of course, some of which are the usual Alpha stuff, but some of them I'm afraid are a result of the Azure and I hope she'll learn over time. I've been to a couple of places I know. I guess it is the defficiencies of the Bing maps, but the cities (while looking really nice) don't always look like they do IRL. For example the buildings are there, but they look different. But that's a minor thing.
The bigger problem I see are the roads and to certain extent the taxiways, especially on smaller airports. They are populated by vegetation. But like I said. I hope Azure will learn the difference between a taxiway and a meadow over time. I hope.
But overall, I'm impressed. And the aircraft handling and physics feels great. Landing with a crosswind is a real challenge (probably in part because I haven't bothered pulling out the yoke and pedals, yet and I'm playing on HOTAS I have always ready for Elite, and handling a rudder with a twist stick isn't exactly precise) and a wind shear can REALLY ruin your day on final. The stall mechanics feels great and you quickly learn to hate it, on turboprops in particular.