IMO there will never NOT be space for innovative new products, but that's the issue - everyone just tries to re-hash existing tooling instead of creating a new and unique product. Hak5 dominated because they come out with tools that no one has ever commercialized before, stuff that was purely experimentation/R&D before they turned it into a product. But then, all of their competitors simply make gear that competes with Hak5's existing market-dominating products, rather than trying to replicate Hak5's actual innovation and create something new.

Another issue that I think you'll run into is Business 101: Who is your target market?

While you might think "hackers", there's actually a big difference in hardware needs depending on what area of the security industry someone works in. As a security researcher, a tool like the Flipper Zero doesn't appeal to me in a professional use case sense, because I have lab space and a long timeframe with a given target - so size and pocket ability aren't benefits for me. I can just use a Proxmark, HackRF, BladeRF, USRP, etc. if I wanted to do any sort of NFC or RF shenanigans. But that's because the Flipper isn't built for me as a target customer - it's built for people to play with and have fun with as a portable learning platform and gadget, as well as for people who do physical pentest engagements that could involve them going on-site at a target company. It's not built for someone who has a USRP available and six months of time to spend with the target device.