The old Fallout games will work very well even if you have a "crappy" computer, because they are so old. They are also http://www.gog.com/en/mix/fallout_classics.
In any case, I don't think any Fallout remake is particulary likely. But instead that Bethesda will focus on having new games to the series in development, just like they do with the TES series which hasn't seen any remakes either.