Provided they do not relax their standards, I don't see there being an issue. An MS appeals to professionals who are unlikely to relocate for a program. I'm in a suburb of NYC; if I wanted an MS, I'd have to consider commuting to Princeton or Yale, at an hour and a half to two hours each way, to the much closer NYU or Columbia but with similar travel times once the intersection of mass transit schedules and class times are considered, or to the state school 15 minutes away with a much less prestigious program.
Meanwhile, GT has a prestigious program at a cost comparable to or better than the state school, with no commuting issues. It's the program I'd go into, and I live close to a surfeit of prestigious CS programs! There are plenty of qualified applicants across the country that don't have the option of "drive to your favorite of the 3 nearby Ivies".
If they keep the admissions process and curriculum/evaluation equivalent between online and in-person, then going online greatly expands their applicant pool but doesn't necessarily dilute it. If the program decides to relax their standards to get even more money, then they'll have problems, but that strikes me as being penny-wise and pound-foolish.
Also has a lot to do with selectivity. At the entry level, companies can rely on selective institutions to do some of the vetting for them.
One is a Udacity Certification, the other is an Accredited Georgia Tech Masters Degree.
"Udacity is not an accredited institution and we do not directly provide college credit. We have, however, partnered with Georgia Tech to offer an accredited, fully online Master’s Degree in Computer Science. While the courses are hosted on Udacity, the degree is conferred by Georgia Tech. Learn more about our Georgia Tech partnership"
https://udacity.zendesk.com/hc/en-us/articles/207991913-Can-...