The Battlestations: Midway demo on Live has really sunk it's claws into me.
Essentially Battlefield 1942 + RTS without infantry or tanks, it captures the spectacle of pacific theater WWII like few games I've played. You can jump into any vehicle at any time, but I've solely been playing it as a strategy game. Lots, even most, people I've played online with (MP only demo) prefer to control the aircraft and ships themselves, so it's a game that lets you have fun with it, however you prefer.
Unlike ST: Legacy, it lets you switch to your units without forcing you to take control of them, which is key to my enjoyment. I want to SEE the carnage that results from my actions, not necessarily control Joe Blow in the middle of it. The visuals generated from 3 squadrons of Zeros protecting a player controlled battleship as it repels wave after wave of human and AI controlled bombers and torpedo planes is just unmatched in any other game. I find it regularly breathtaking.
Caveats: It's got a hella steep learning curve, is not especially polished, locks up on me exiting games about 75% of the time and since it's an MP only demo expect to get screamed at/kicked/Live-style abuse from minors. Nevertheless, once you've got the hang of it, it's a very different and engaging experience. It seems questionable releasing a MP only demo with no tutorial for as complicated a game as Battlestations: Midway, and the forums are very split into the hate it/don't hate it camps. Reminded me of the Outfit demo, which I also adored.