Elizabeth Warren actually said...

When we can't describe even in the most general terms what will happen if you engage in a cyber attack against us, ... deterrence at that mo...

I think that these new domains may well be decisive in any future conflict and we should be putting a lot of attention on them.

Are there other more achievable near-term technologies that we should be investing in right now to put us on the right path?

Our potential adversaries are more interested in challenging us through cheap and asymmetric means.