That same survey finds that only a quarter of respondents actually expect it.
Gamers want to be able to keep playing the games they own - there's no reason to expect any differently. Just as DVD owners expect to play their DVDs in a Blu-ray player, gamers want to put their older games in a new system and play them. If there's some sort of upscaling feature, so much the better.
A recent survey conducted by GameSpot reveals that 83% of those that responded marked backwards compatibility as either "somewhat important" or "very important." Perhaps not surprisingly, only 24% of those that answered the survey actually expect the feature in the next generation of consoles.
Also high up on the "want" list are better graphics (80%), the ability to download full games (49%) and better integration of motion controls (32%). Things like Facebook integration, touchscreen controls and 3D capability sat at the bottom of the list.