I hate to be negative, but I wouldn't hold my breath for Apple to get into the virtualization market.

1. The support costs are going to be large.
2. There are two companies currently actively, heavily competing. The pace that Parallels and VMware are currently at is almost unbelieveable.
3. The third party solutions are inexpensive and only affect customers that are currently interested, rather than forcing the cost onto Leopard upgraders and future Mac owners.

What it basically comes down to is the fact that Apple is getting exactly what they want out of third party development without needing to support them financially. I just don't see a compelling business case for Apple to do it.

Added later: And to be honest, I wouldn't want them to get into it. They could deliver a virtualization feature that would effectively kill the growing third party market, which will, although better, fail due to the fact that it will cost and isn't included in box. Virtualization software for Macs would stagnate.

Here is what I think happens (not that i matter lol)

1 - First we get Leopard preview

2 - iLife and iWork updated tells a few of their features not much time spent on these two

3 - 10.4.10 released available today

4 - Mac Mini Update: All models with 1GB RAM Low end now 2.0Ghz Core duo high end 2.16Ghz Core duo (thats Core Duo no Core 2 yet)

One More thing..

New iMac
Santa Rosa
All models get 2GB RAM except for low end with 1GB
Low end still has intel graphics but its the updated GMA 3100 all others use nvidia GPUs (since ATI is now AMD)
No LED displays yet


my 2 cents