When I open to app store on an iMac, does it limit the apps I see to only apps that will run on an iMac? Kinda looks like that? If so, any way to see iPhone and iPad apps too?
Johnny, as far as I know -- from personal experience -- you cannot cross reference apps. You can only see Mac apps on that app store and iOS (iPhone and iPad) on iOS devices.
The "App Store" application on your Mac only shows Mac (OS X) apps.
In iTunes on your Mac, click the application button in the upper left, and then select the App Store tab in the upper middle-ish-right to see the iOS App Store. (And roll your eyes at the ever worsening itunes UI.)