As an avid reader personally, I would have loved that. My son is an avid reader too, however, interacting with his friends and my colleagues over the years, I have realized that not everyone learns well or absorbs enough through reading alone. Some people need to see and/or do to learn.
Reading is a great skill and encouraging kids to read has real value. I have an avid reader who is ten however who struggles with many aspects of writing and communication (organization, idea structure, penmanship, thinking before you speak, etc). He would much rather read and often rushes through other work so he can get back to his reading. He doesn't need more time to read sitting in class, he needs more practice speaking and presenting, learning to construct and edit work and other interactive skills.
Sending your kid to school to read independently seems like a waste of resources, likely tolerated because it takes work from everyone's shoulders and no one complains. I'd like to see the reading be the homework and the day filled with practice, teacher guidance and student coaching, similar to what Sal Khan promotes. None of this has much to do with technology and screens though...