I think Chromebooks are awesome, but not at grade 1.

Kids are too developmentally different at that age. They range from the kids whose parents delay kindergarten a year to make them better at sports to the kids put into school early to save money on daycare. Using a trackpad and keyboard is too abstract.

My kids' school uses iPads as limited enrichment devices until grade 3. As a reward, they get to independently use an iPad to do some things. Grade 3 and up Chrome is there in a similar way, and they start requiring them at grade 5. They are a little conservative, but I think they are getting better outcomes, especially with younger kids.