Cars are getting smarter, either with the help of tether or paired smartphone or by themselves. Some car makers have flocked to Apple's CarPlay while others have jumped on Google's Android Auto. The one major platform maker that seems to be missing out, however, is Microsoft. If Nissan's teaser is any indication, however, that might be changing on Thursday. To remind people about its CES 2017 keynote, Nissan has sought the marketing help of Cortana, and Microsoft, of course, hinting that there might be a big reveal coming up.