I really hope you're right. The demos I saw of Lion scared me a bit about the future of the OS. I was hoping for some new features/refinements, along the lines of tabbed Finder windows, better Spotlight, and Resolution independence. Instead, I saw iOS looking menus, and not much by way of features. That caused me to be concerned about the direction of the OS. My main concern is that an "iOS direction" may remove and simplify, rather than supplement and improve.
I should disclose that while I love OS X on my desktop, I have the robot in my phone.
EDIT: Added a sentence for clarification of my concerns.
There's not a whole lot to gain by making the desktop increasingly iOS-ish. Most of the iOS advantages don't 'fit' quite right, the existing base would scream, and the market they'd theoretically be chasing with said changes will have been happily working on their iPads for years.
As far as convergence goes, what I'm starting to wonder, is if it wouldn't make more sense to add a docking solution to iOS instead. After all, Moore's law is bringing desktop-class power to the iPad far faster and more convincingly than any case for iOS style interaction on the desktop is being made.
So the question then arises, whether it would make more sense to support a docked iOS 'mode' -- allowing use of desktop-style app UI and interaction (keyboard/mouse) in native iOS apps -- or just run OS X virtualized when docked (with some shared file bucket between the OSes)?
Keep in mind the fact that all you know about OS 10.7 is what was announced at the 'Back to the Mac' event--which was specifically highlighting aspects of iOS that are being carried into OS X.
I guarantee there're are lot of other improvements to be seen, come summer.
I should disclose that while I love OS X on my desktop, I have the robot in my phone.
EDIT: Added a sentence for clarification of my concerns.