Concept phones are a love/hate sort of thing: you love what they bring to the table, but you hate the fact that you might never see it materialize. The latest shows an HTC-made “Cartridge Phone” that would allow you to switch between several operating systems – including Android and Windows Phone 7 – by switching cartridges in and out. In a perfect world, we’d all want that phone. I’m not even sure if it’s technically possible, but licensing issues alone would get in the way. But if someone is able to make a reality out of this, let me know: I’ll be the first in line. [Yanko via Android Community]