Currently every block generated creates 50BTC + transaction fee for the person or pool who generated it. Every 210,000 blocks (about 4 years), this is reduced by half. Until eventually creating a block generates 0BTC. The idea is when it reaches this point the transaction fees should be enough to make it worth wild for the network to keep generating blocks.

I think you are missing a point. The next block in the series is based off the previous block. So if we are currently at block N, I can only compute block N + 1. I can not compute N + 2 until I know what N + 1 is. Also the difficult changes are based off the computing power of the network. We can make a guess of what the next difficulty will be, but won't know for sure until the last of the 2016 blocks from the previous difficulty is created. So it would be impossible to start generating at the next difficulty level until the previous on has ended.

Basically there is no way to compute future blocks until the current block is completed.

-SteveA