Remember when ETFs were just cheap ways to track the S&P 500? Those days are long gone. The exchange-traded fund universe has exploded into specialty sectors, investment themes, and leveraged products that would make your grandfather's mutual fund look quaint.

Now, according to Roundhill Investments CEO Dave Mazza, the industry is entering yet another phase of evolution.

Beyond Passive Tracking

"The next phase is about structure and outcomes," Mazza explained. "More active ETFs, more options-based income strategies, and more defined outcome tools."

After years of ETFs serving mainly as sector exposure vehicles or portfolio tools that undercut mutual fund fees, the products are transforming into something different. Mazza puts it this way: "ETFs are evolving into modular portfolio components rather than just passive beta."

Translation? Instead of simply mirroring an index, modern ETFs are becoming precision instruments designed to achieve specific investment outcomes.

Roundhill's 2025 Launch Spree

Roundhill put this philosophy into action by launching around 30 ETFs throughout 2025, covering both thematic plays and income-focused strategies. Among the notable releases were the Roundhill Humanoid Robotics ETF (HUMN) and a relaunched Roundhill Meme Stock ETF (MEME).

The company wasted no time in 2026 either, debuting the Roundhill Robotaxi, Autonomous Vehicles & Technology ETF (CABZ).

"Robotaxis and self-driving cars have the potential to reshape how we think about ground transportation and are already integrating into cities around the world," Mazza said. "We are really optimistic about the innovation in the space and growth opportunity of the market demand."

It's a bet that autonomous vehicles will move from science fiction to everyday infrastructure—and investors can now get targeted exposure to that transformation.