I think there are pros and cons to both. I love a hardcover Bible. Just the feel of it, the tactile nature of turning pages and reading physical pages. That said, the smart phone is a lot more convenient and can carry/access many more translations. Also, you take your phone most places, so it's always on your person. I use both a physical Bible and Bible translations etc. on my laptop and smartphone. In church I tend to use my hard copy Bible.