That depends on a couple of things... Assuming this was an extract brew and you used the recommended yeast strain for the recipe or kit you brewed, then chances are you'll finish up right at or near the projected final gravity.
If it was an all grain brew and/or you used a different yeast, then there can be quite a few variables. Mash temperatures can lead to wort that's more or less fermentable. Some yeast attenuate more or less (some times a LOT more or less) than others. Etc, etc...
That said - there's a lot of other things going on at that point in fermentation, and just because a beer has reached a specific gravity does not necessarily mean that it's ready to bottle. In general, you want to be sure that it's reached a constant gravity for at least 3 consecutive days before you bottle (to make sure that you don't wind up with any bottle bombs!). Also, if you give the beer a few days after reaching final gravity, the yeast can clean up some of the by products of fermentation, often leading to a cleaner tasting beer.
However, I do know a guy who, as a general rule, kegs dang near everything at day 10. And I can honestly say I haven't had a bad beer that he's made.