I'll give it a few days before deciding for sure, but after a few hours I've mixed feelings about the demo.

On the good side, I was impressed how well my Geforce 4 MX 440 (64 Mb) performed, even with most settings turned up to medium or high. I agree with longasc's point about far away graphics not being much of an improvement but I can live with that.

On the other hand: the speed is a real pain (slow it down CA, please). And there's an arcade-game feel to it that's hard to describe exactly but it's there nonetheless. Maybe more familiarity with the new controls will ease the feeling but I worry that I might end up feeling as pessimistic as Darkmoor Dragon (on a .com thread) about the game. To paraphrase, he sees RTW as CA selling out to a wider C+C market and spoiling the great tradition of the TW series by putting eye candy before gameplay. Harsh but if the changes to the campaign map, diplomacy, seiges etc don't live up to my expectations I might start to agree with him.

We'll see.