I don't believe their cost figures (look above; their 250/t for CO2 doesn't jibe), and I think electrification of most residential/commercial uses will be the superior solution (it's more efficient even if the electricity is produced by burning natural gas). Industrially, hydrogen is just fine. After all, industry already manipulates vast quantities of hydrogen.

The fossil fuel uses that are the most difficult to displace involve liquid fuels for transportation; natural gas has limited use there.