The impending date on which Pujols will clear this milestone is soon to be realized. Whether next game or the last of the series against the Pirates, he will jack one out, c'mon it's the Pirates. Yet this is not the key area of focus, it is rather a springboard to Pujols future achievements he will accomplish.
Let'sstart with the most obvious and one that has been floating around for the past few seasons; The Unicorn-esk Triple Crown. Seemingly impossible to catch or rather attain, much like the mystical creature above. It has alluded the greats of the game since the 40's & the NL hopefuls since 1937. Yet, strangely Pujols is closer than ever to reaching it. Not because he is having a record setting year, but simply because an average year or consistent year from Pujols is enough to beat out the competition, and in the end that's all it boils down to, being the best that year. Everyone knows the facts 10+ season w/ at least 30HR's, .300BA, & 100RBI's. Pujols has almost always lead the NL in RBIs & HRs, however he never could edge out the competition in BA, yet the number to beat is .323 & he almost always hits a .330. So I say the triple crown is high possibility & he should be able to reach it this year.
Next is more of a long term accomplishment. It's where he will rank on the All-Time Home Run List. Right now he sits at a comfortable and outstanding 399(soon to be 400). Let's get to the math - Pujols hits on average 36HRs(this is his 10th yr), and the average MLB lasts 20 years, so 36x10=360; & 360+399=759, placing him 3rd behind Bonds & Aaron. Even if you lower it to 30 HR/Yr he still hits 699 & is 4th behind Ruth and the previous listed. So the distant future is bright.
Finally is probably the least likely to happen, however still very possible. Pujols will take home the NL MVP & World Series MVP. The only doubt about the season MVP I have, is there are some players which have helped their teams rise to prominence this season, like Joey Votto & Martin Prado. But the Cards reaching the World Series and winning is still stretch. While I have now doubt that they have above a 60% chance to go to the big stage, October is still one of the toughest months in sports for teams and athletes. The potential is there though, a good 3-man rotation-and Wainright could win the Triple Crown-& some decent depth there as well; as well as the formula for the '06 team, rookies. The team leaders who were once rookies back then, pushed the veterans down the stretch & with all the injuries, there a lot of outstanding rookies. But even so, there is no telling that the Redbirds would win the World series much less, someone else steps up bigger than Pujols.
However, as a devoted Cards fan my predictions are as follows: Pujols has a year never before seen in baseball winning the Triple Crown, NL MVP, & World series MVP & The Cardinals beat the Yankees in 7 for a classic 1940's rematch.