A bit miffed that the Euro PSN version is an extra month away, as next month is crazy hetic as it is. Still, day one purchase, it's taken far too long for this is get the arcade port it deserves and hopefully this will sell well enough for them to want to port more over, especially games that never got a port at all like Scud Race, Daytona USA 2 etc.
The problem with those other games is that they havn't been ported to anything. Most of the Sega arcade games that are on XBLA are ported from Windows/PC based arcade hardware or from console ports.
Outrun Online Arcade originates from Xbox1(Chihiro)/PC/Lindbergh platforms
Sega Rally Online Arcade originates from the Europa-R platform.
Daytona USA was ported to the Ring Wide platform and likely ported to Xbox from there.
After Burner Climax was ported from Lindbergh as well.
It's a lot easier to port this modern PC based code to a console than to port up something from a bajillion years ago.
VOOT is probably the only non-emulated Sega arcade game on XBLA, and while it's a beautiful port, I get the feeling that it's 1200MSP price tag, 400MSP more than any other Sega arcade game on XBLA, was a result of the cost of porting the game from Model 2 to Xbox 360.
More ports are totally possible, sure, I'm just suggesting that Sega is focusing on the 'Easy and cheap' to port games right now.