Rock Band 4 will run at 1080p/60fps and release this October, according to a report in UK games industry magazine MCV.
Speaking in the latest issue, product manager Eric Pope told the mag that Harmonix had "built a brand new engine for Rock Band 4 to make the most of the new hardware. It's going to look 'next-gen' with more realistic lighting, character models, and animation.
"It'll be 1080p and will run at 60fps," he said. "I know there's a vocal group of players that want to hear that. But what to me is more exciting is the online infrastructure of the consoles. It will open a lot [of] opportunities for us to support the game in more reactive, timely ways".
A release date was also teased in a separate article, in which MCV stated that "Rock Band 4 is now set to return this October, and widespread reports claim that Guitar Hero is also braced for return."
Harmonix has yet to formally confirm a release date beyond a 2015 window on PS4 and Xbox One.