I just heard iBeacon and don't know anything about since you talked about. I couldn't understand, how can iBeacon could change it all?

I have .Net. but I just read a c# book, just tried samples years ago. c# is a pure OOP language. But Python and Ruby seem me more like VFP than c#.

>Without knowing anything more... forget desktop. iBeacon could change it all. It's simply a Bluetooth access hub. Mobile devices used in the store will be used and access iBeacon. While it's an Apple product, you can get at it with pretty much anything. For example, the latest issue of CODE Magazine shows how to use iBeacon with .Net. Do you have an aversion to using .Net?
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>>I'm a desktop developer. But I think subscription model would be nice with web for future or sell applications at Windows store would be good.
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>>So in first desktop. Maybe future web and/or tablet. Python seem work at Mac OS without any change, I see more MacBook users. It would be good my applications Mac X version. I have a retail sales application and I don't see any commercial applications like this at OS X...
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>>Currenty desktop.
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>>In future web or store (Windows and if possible Apple). I don't ask customers for invoices at future. They pay, they use. Subscription with Web and Windows/Apple store models good for this. But I'm not sure what's the best... Maybe at this time subscription with RDP would be best simple approach. A canadian developer from UT (sory, I can't remember his name) adviced me rent application with RDP.