Irish chef Richard Corrigan says the restaurant marketplace will be 'completely changed' once businesses start reopening.
Mr Corrigan is currently in London, where - similar to Ireland - most restaurants remain closed due to coronavirus restrictions.
Here, restaurants will be allowed reopen next month once they can ensure recommended social distancing.
Speaking on Down To Business, Mr Corrigan said the shift towards takeaway food in recent weeks and months has highlighted the high costs facing all restaurants.
He said: "What the consumer has learned in the takeout food culture [is that] you're still paying restaurant prices, for obvious reasons - food and the operating of restaurants are terribly expensive.
"Two pizzas in London would cost you forty quid, and I'm sure it wouldn't cost you much different in Dublin right now if you're buying them from a decent place.
"Everything has changed... the cost model has changed. Everybody has been making a small margin... that's unsustainable going forward.
"Competition got fierce, and it has brought the prices down. [But] this will completely change the marketplace, because there will be an awful lot of restaurants and bars not reopening on the same model they closed down on."
Mr Corrigan said he's an optimist and believes people will keep going despite the current challenges.
He told Bobby: "We're at the deepest, lowest point that anything can be - but being human we will always climb out of whatever hole we've fallen into.
"We'll build again, we'll renew... maybe renew with a better ideology, who knows."