What Magic Does Apple Hold for Next Week?

The new iPhone announcements expected next week are exciting, but I am mostly interested in updates for Mac OS X 10.7 Lion. I have read many posts online from folks about their Lion experience, specifically about speed and multitasking, and it seems like certain hardware configurations fare better than others. My MacBook 5,1 seems to get the short end of the stick despite having 8GB of RAM. If the RAM gets about 3/4 used and even though there is still physical RAM left for apps to use, my MacBook becomes sluggish, sometimes to the point of needing a reboot to return to normal responsiveness. The issue has become such a pain that I am considering reinstalling Mac OS X 10.6 Snow Leopard. Before I do that, I am going to wait and see if the next update for Lion, v 10.7.2, is also released to coincide with the iTunes update for iCloud.