Capcom Arcade Stadium on Steam
Relive the Capcom classics! Get 1943 -The Battle of Midway- and game logo wallpapers free with your download!store.steampowered.com
I'm not one for pre-ordering games, but I couldn't resist.... praying that it's relatively easy to configure for a portrait mode monitor.
So.... good news and bad news....
It does indeed do a good job of automatically adapting to a portrait mode monitor, and has a reasonably good set of display options with different border options that allow for the game to be either full screen (stretched), full screen with upper and lower border (keeps the correct aspect ratio), or smaller screen wrapped in a "3D" console.
OTOH, the controller setup is a major PITA and the buttons aren't fully mappable (triggers have to be mapped to XBox triggers, etc.... ).
I was on the fence as to whether or not I wanted to try for a refund (based on the stupidly crappy controller settings) but I kept at it and managed to cludge settings into steam that will work for both my Pinball and this.
Only played 1943 so far, but it plays well (as well or better than I've seen it on mame) and has a decent enough front end for the included games.