Windows 10's oft-reported Spartan web browser may not just be a leaner, fresher substitute for Internet Explorer -- it could have a few tricks up its sleeve, too. Sources for The Vergeclaim that Microsoft's voice-guided Cortana assistant will be present both in the OSand in Spartan -- much like Chrome's "OK Google" feature, you can reportedly open a new browser tab and ask Cortana to look something up, whether it's a website or your flight itinerary. There's also talk of pen-based annotations for websites that you can share with others through the cloud.