The GDC 2019 survey is out, and as it turns out only 18% out of 4K participating game developers are already working on next-generation games.
On another note, the majority of developers don’t seem to think that Steam can justify its 30 percent fee anymore.
Source: N4G PC GDC 2019 Survey Reveals Only 18% Developers Working on Next-Gen; Devs Skeptical on Steam's 30% Cut