Not the end of the world. For frum men working outside our community, it will be a problem getting to minyan in the morning (possible solution, have more “downtown” minyanim, closer to the places of employment). But those working for Jewish organizations or businesses, or teleworking, can adjust hours. And of course, women won’t be affected.
It will give people more time to get home on Friday afternoon, and more time to finish Shabbos preparations in the winter.