The biggest issue with Enterprise Wifi is the lack of support for unsigned certs (or Certs from an untrusted CA). I hate to bring up iOS, especially since I hate it, but it easily supports this was just a verification check to allow the untrusted cert (OS X also supports this better than Windows). This is what makes a device accessible. Not the technical feature sets, but the ease of use. There's an obvious possible security issue, but if any Enterprise is truly concerned about security they would have further end-to-end encryption to whatever data is being transferred between client/server, even if they are between seemingly internal networks.