I really wanted to get a good 1440p monitor and the upcoming Asus mg279q looks like the holy Grail I've been waiting for. However it says that it is freesync . what does freesync do? Also I'm looking to get a new graphics card and if I get this monitor should I get an upcoming 390 for the freesync? Finally my last question is should I wait for other companies to come out with monitors like these for lower price or is asus good?