[ and KPCB notes that the initial $100 million has been fully committed to 14 companies ...
In other words they have handed out all of the money from that version of the fund. It is effectively closed.
It is common practice after allocating all the money out of your current fund to raise money for a follow on fund for a new block of investments. Specific VC funds have a fixed liftetime. They typically have to be closed out after a fixed number of years ( for example 10 years. ).
So the 2008-2018 fund is fully committed and the only thing to do at this point is wait for it to close out. What are they suppose to do, twiddle their thumbs till 2018 until starting another around? No. Typically will look like.
2008-2018 launch and fully invest by 2009-11 (depending on economic conditions). Then 2010-2020 repeat. Then 2012-2022 repeat . As long as the VC firm can go out and get institutional, mr. megabucks, and other large monied investors to drop a new $100million on them every two years you just keep launching a steady stream of these.
Coinciding with the iPad only boosts the hype factor ( and perhaps greased the wheels on collecting the next round of money given the economy is tighter than average. Although there is lots of cash lying around with a small few of folks. ) If it were an "off" ( no super duper hype show ) year then would still raise a fund and invest again. ( or perhaps spread money around to firms that were going to do iPhone and Andriod and ... ) It may have been a smaller amount though.
You chunk and decouple the funds managing because if make some really bad calls ( nobody is perfect) and the fund blows up you have limited the damage ( *cough* Bears Strens and Lehman ). It is called risk management. A significant fraction of companies funded by a specific fund instance will never pay off. Nobody picks only winners.
Still unclear though if the low pricing pressure of the app store is going to allow some huge multiple winner to emerge out of these first two funds. There will be companies that survive and continue, but is anyone going to place huge multiple on a company selling $10.99 apps where apple is guaranteed to consume 30% of that (not to mention the tax man , development cost, advertising costs, ..... and no support contracts to amortize the customer base from, so constant stream of upgrades. ) ?