Watched the introduction movie and think it looks nice, but... more and more I think phones and tablets don't belong at the D&D table. It simply distracts too much. With several friends, I play D&D 4th edition and some of them use tablets for the character sheet. But in many cases they use the tablet to do other stuff, show funny movies, etc. I know we all don't take D&D extremely serious, it's just part of an evening hanging out, but it's one of the main causes we don't achieve much in our campaign. Often we set rules like 'tablets only for the character sheet'. That works for several evenings and allows us to really move forward in our adventure, but after that, the browsing etc slowly comes back.
Because of the arrival of the 5th edition, I fear the 4th edition online character builder will soon be taken offline. A few months ago, I decided to go back to only use the books. The only thing I really missed was an easy way to deal with the power cards. I made myself an Excel template to solve that. Extra bonus: no more need to cut out all the individual power cards. I hated that after printing out a new version of my character sheet. And although it's less digital, reading and browsing through all the D&D books feels more nerdy.