Yes, you get the scrolling waveform if you're using the XDJ-700 as standalone players with Rekordbox connected via ProDJ Link.
When used in conjunction with Rekordbox DJ as a HID, there's no scrolling waveform as of yet–that goes for the XDJ-1000 mk1/mk2/CDJ-2000NXS2 as well.
This is a requested feature but one that has not been introduced yet.
Cheers.