I've been happy with Pixelmator ... I suppose I can't blame them for wanting to continue to monetize their product. Seems like the app store doesn't have a way to have paid upgrades (e.g. v2 to v3). However it probably means the existing Pixelmator probably won't get any new updates aside from fixes.

I also would like to see what's different/new in the Pro version, but I'll probably upgrade anyway.