"The two (test and ODI) teams are building up to a big summer and you have guys who are in both squads that equally feel the importance of the Ashes and the World Cup," Morgan was quoted as saying by Sky Sports.
"The recognition from those players to say there is not a lot of difference between the two, and that it is a massive year and a once-in-a-generation opportunity, shows there has been a shift in emphasis to one-day cricket in this country.
"Our potential as a team over the last four years has certainly moved forward, with the desire to make 50-over cricket a priority, as opposed to an afterthought. That has benefited not just our team, but the game too, and helped to raise the bar."
Five English players, including Jos Buttler, Ben Stokes and Jonny Bairstow, are currently playing in the Indian Premier League, which Morgan said was ideal preparation for the World Cup.
"The preparation they will have out there by competing against some of the best players in the world in a high-pressure environment is absolutely outstanding," Morgan added.
"The conditions, the build-up and putting yourself under more pressure leading into the World Cup is obviously going to help in the long run."
England begin their World Cup campaign on May 30 against South Africa at The Oval in London.
(Reporting by Rohith Nair in Bengaluru; editing by Clare Fallon)
