Basically, the Xbox will still very much be a curated platform (more so than Windows or Windows Phone), with the Xbox team deciding if something even makes it onto the console. What's more, Microsoft still gets the last word on whether an app will be locked behind an Xbox Live Gold subscription. All told, then, it's not like we're suddenly going to see a glut of Windows apps repackaged for Xbox. To quote Guggenheimer: "Terry Myerson [EVP of Operating Systems] showed Xbox because technically you can do it." Indeed, Myerson's presentation today was mainly about developing apps for PCs, tablets and phones. So it's there where you should expect to see that universal app selection.