If by classrooms we're only talking about lecture halls where the information flows in one direction, then yeah, I could see this possibility. After all, students still need to attend things like labs, exams, and some other types of interaction, right? I could even see some back and forth communication working better online (async vs sync). I think the biggest hurdle isn't technology, but of the inability for many to express themselves (or understanding others) through the written word.

Doing recent research in online schools for graduates, I ran into another problem: professional acceptance. I couldn't find one online law school that is even state accredited, let alone ABA accredited. Without backing from theses types of institutions, technology is the least of their worries.

Even if the schools were accepted, look at the success rate of Concord Law School:

http://www.calbar.ca.gov/calbar/pdfs/admissions/Statistics/JULY2008STATS.pdf

Concord Law School has a 44% pass rate. This is a little bit better than half as good as the /worst/ ABA accredited school. Note that before potential students can even take the real bar, they had to have passed the baby bar too. That success rate is currently clocked in at 14.3%:

http://www.calbar.ca.gov/calbar/pdfs/admissions/FYX/FYX0810-Stats.pdf

I'm not certain 11 years of technology advancements is enough for some of the degrees out there.

They've already been dropping support for legacy systems. Firefox 3.x doesn't run on OS X below version 10.4:
http://www.mozilla.com/en-US/firefox/system-requirements-v3.html
Thankfully, the 2.x version is still available.