The pictures I see of the B7e7 shows it with winglets. Boeing appears to have changes their mind over winglets
No, Boeing hasn't changed their mind over winglets. While the short-range version of the B7E7 will have winglets, the base and the stretched versions (i.e., the two long-range versions) will have raked wing tips. The wing-span of the short-range version is limited by certain gate restrictions. So my educated guess is for an equivalent wing area, a raked wing tip design would have longer wing span than a regular winglet design. That's probably why the short-range version will feature a regular winglet.