I too have been shifting more towards Intel, though my reasons are a bit different. I bought my 2006 C2D MBP as a temporary replacement for my 1.5ghz Sawtooth during the summer months. I have since had to retire the Sawtooth due to its rust issues being worse than I thought. I discovered through using this MBP that I could do everything in Leopard on this MBP that I was doing on the Sawtooth under Leopard, but with better performance. Leopard is my favorite version of OS X, so I really like having a Mac that is good at running Leopard. I will admit that I am so impressed with the performance of this MBP, that I have less incentive to buy another Sawtooth or get a G5. Most of my OS X apps are universal binaries and were bought with Leopard compatibility in mind. With Leopard being my preferred version of OS X and my MBP currently the only working Mac I own capable of running it, I have been using it more than my PPC Macs. I've been dual booting with Linux as well and I am amazed at the results I have gotten so far. If I find the right distro I may shift most of the online stuff to Linux and use Leopard mostly for offline stuff.
I'm not abandoning PPC, rather I am rethinking what I want to do with it. I think when it comes to PPC Macs, I will focus more on classic Mac OS and early OS X rather than Leopard.
It's fun being able to get old Macs online and see how much of the modern web they can handle, but it's not the only thing I use these Macs for. I like using them for offline things too like creative writing, gaming and playing around with creative apps like Photoshop. So even when the day comes that the internet is no longer possible, or is extremely limited like it currently is on my Centris 650, on these old machines, I'll still be doing stuff like writing and playing games on them.