Look at the story... It's a suspention, pending training for employees... Not a termination.
Don't hold your breath. Remember guns are kinda like your virginity, once it's gone, it doesn't come back.
Wal-Mart, at least in California, can now track its sales to see how much profit is lost due to lack of gun sales. It can then decide whether or not to resume sales.
If the lack of sales doesn't do permanent damage to the bottom line (and I doubt it will, more people buy most household goods at WM, than shooters/sportsmen buying guns), then they can permanently end sales.
They can then curry favor from liberal politicans, saying they dropped gun sales. This would also work for most liberal buyers also.
Then they can tell sportsmen/shooters how they tried but the government forced them to comply with those pesky firearms laws, and because of the actions of employees (remember UPS), not criminals, they can sadly no longer sell firearms.
Not saying this is going to happen, just saying that the possibility does, indeed, exist.