Here are the ACC bubble teams with remaining schedules:
Boston College (17-11 / 7-7): at Virginia Tech (3/1); vs Wake Forest (3/6)
Clemson (19-9 / 8-6): at Duke (3/2); vs Virginia Tech (3/5)
Maryland (18-11 / 7-7): at Miami (3/2); vs Virginia (3/5)
Virginia Tech (19-8 / 9-5): vs Boston College (3/1); at Clemson (3/5)
I think our best and most likely scenario is for Tech to win out. That eliminates Boston College and likely eliminates Clemson since Duke probably beats them at Cameron Indoor tomorrow. A Miami upset of Maryland tomorrow could knock the Terps out, too. There's definitely a scenario where the ACC only gets 4 teams this year.
While I'm not convinced either that VT is already in, you're right that at least one of these 4 ACC bubble teams will undoubtedly get in. But VT could be in a precarious spot if they win tonight but lose at Clemson and then drop their first game in the ACC tourney.