So the preseason is a sham. But Week 3 is easily the most useful time, a good indication of what coaches are thinking going into the season. After dress rehearsals this week, Week 4 is a serious waste of time for everyone involved. So what did we learn from the Bears vs. 49ers game last night?

1. Chicago's receivers are impossible to draft. Rashied Davis looks like the number one, playing almost every down. I watched closely and Brandon Lloyd, Devin Hester, and Marty Booker rotated after him evenly. Good luck finding consistency there.

2. When the 49ers first team lines up with two tight ends, like they did the majority of the time, they could be a nasty run-blocking unit. Vernon Davis is one of hte best blockers in the league and Delanie Walker has the size to make a difference. They cleared big holes for Frank Gore, which was nice to see. Davis also was active as a receiver and even lined up in the backfield.

3. J.T. O'Sullivan reminds me a lot of a poor man's Kitna. Pretty throws, a lot of improvisation, and big mental mistakes. It could be a fun ride, making JTO a reasonable QB2 pick in the last rounds if you draft a top-5 QB. He won't last 16 games, but there may be some yardage there.

4. It's hard to tell how the 49ers receiver depth chart will shake out because Arnaz Battle and Bryant Johnson are hurt. For now, Josh Morgan is the starter.

5. Kevin Jones looked healthy enough to make the team and be Matt Forte's backup.