Netflix just got some more competition. Walmart launched its video streaming service today and don’t just write it off as a “me too” service. This is a serious offering. Walmart bought Vudu 18 months ago and has slowly evolved the business. Vudu, like Netflix, is available on a number of set-top boxes, gaming systems, and media streamers. Users have access to 20,000 titles, including titles the same day they hit DVD, when used on one of these devices. The just-launched service puts Vudu streaming directly on Walmart.com for instant viewing. The Walmart.com service doesn’t seem to have access to the entire library, but there’s still a good chunk available and that might be good enough to make Netflix slow its roll.