My only concern is that having different laws for each state may make it hard for companies to comply and it may even lead to “location locked” devices.

Given how difficult it is to pass consumer protection laws without lots of loopholes, it's possible that the different laws in each region could work to our advantage: A corporation might sensibly decide to observe all the protections globally, rather than exploiting regional exceptions and loopholes, making the patchwork of laws act almost like a whole blanket. That wouldn't be legally enforced, of course, but it would be better than nothing.

In principle, all these state laws could also inform creation of a single, more comprehensive federal law. Here's hoping.