I would't put the PSP in its grave already; while 1 million plus is a nice number to brag about, I can't help but think that these are the same people who most likely have written off the 'Cube. I hate to sound like a broken record, but it'd be nice if the games were flooding, not trickling before the PSP comes out.
For the past two years, the big N has used the unsuspecting month of March to get good sales. Case in point: Wind Waker and Pokemon Ruby/Sapphire in 2k3, Metal Gear(Despite lack of advertisment, it was number 8 according to NPD) and Pokemon Colleseum in 2k4. Is Sony going for the "Me-too" attitude here with a (tentative) release date in March?
The installed userbase does put the pressure on Sony somewhat, but I don't expect much from the casual gamers who got caught up in the DS frenzy. I don't mind being wrong though in this case....