It seems Project Spartan will become the new default browser for consumers but Internet Explorer will stick around for a bit longer for businesses and to ensure compatibility with legacy applications.
Project Spartan is not the final name of Microsoft’s new browser but based on a report from The Verge’s Tom Warren earlier today that name will not be Internet Explorer.
This news came out of Microsoft’s Convergence 2015 event in Atlanta, GA yesterday while Microsoft’s marketing head Chris Capossela was speaking to the attendees. "We’re now researching what the new brand, or the new name, for our browser should be in Windows 10”