Some of our major chain stores have done this and expanded on those items. Paper products, cleaning supplies, and dairy products have all been like this since last week. It's not like it still wouldn't sell. It will just allow it to be more spread out. It's really no different other than preventing hoarding possibly.
I actually heard yesterday that they have capped 2 items per on canned goods and other essential goods starting yesterday. This may or may not be true though. I haven't gone to a store since Monday.