There is not really much disagreement about what the important issues are. Get out of Iraq. Stop using fossil fuels. Get everyone affordable health insurance. Inflation and stagnant wages. There is a general consensus now that these are the U.S.'s big problems and we need pragmatic solutions to them. (The other consensus is that the Republican party has collapsed and needs to be removed from power as soon as possible.)
What Obama is offering is a way out of the broken record of baby boomer liberal vs. conservative rhetoric. If Hillary wins, we're in for 4 to 8 more years of the same old partisan story line that has played out since her husband was elected. Many Americans are more than sick of that and that is what Obama is appealing to and that is why he won.
And I think his attitude is basically right. More than specific policy proposals at this moment, Americans need a new mindset.
How Obama turns out remains to be seen, but it's undeniable that he can sure play an audience. I thought that the "this is the moment..." part was particularly rousing, like a nod to Shakespeare's St Crispin's day speech in Henry V.