I'll continue using Hero Lab for the time being, but I like the progress that I'm seeing with DnD Beyond.
After I wrap up a homebrew campaign that I'm running now, I'm thinking of running Curse of Straud. If DnD Beyond has the CoS AP material that wil be nice. But without a combat tracker, the character builder doesn't have much use for me. It will be difficult for me to give up Hero Labs's Encounter Builder and Combat Tracker. Have all rules, monsters, magic items, spells, etc. readily available from a universal search box is very helpful, but I'm not sure I would pay a monthly subscription just for that.
Right now, it seems that DnD Beyond will be more useful for players and than DMs.