Savvy hotel and real estate sales companies are increasingly using 360-degree images on their Web sites to give buyers a you-are-there feel. Seaview Resort & Spa, a Marriott Resort in Galloway on the New Jersey shore, has taken the concept a step further. Working with Motion VR, Seaview has a “walk-through” tour technology at its Web site, allowing online viewers to move through the featured spaces as well as look around 360 degrees. Check it out at www.seaviewmarriott.com.