I don't have any specific suggestions, but it sounds like he is saying we need to find more things that add value to SP (kind to like promoted posts gave people more of a reason to have SBD).
Right now voting power, curation rewards, and long term speculation of a price increase are really the main reasons to power up. The fact you need about $50k worth of SP to really make a difference on the first two is a big discouragement for most people.
Can we think / brainstorm about more benefits that we can offer people for buying/ holding SP?
Beyond that, let's just add more reasons for people to participate on the platform, regardless of their SP.