We did this project in collaboration with Google, and they were great. We wouldn't have done it at all otherwise. But, I still do want to create a node-webkit app, because I think that's what users want, a normal app, not some weird hybrid thing.
Yeah, I looked at node-webkit as well. The reason I was thinking of going with Chrome was because it's easier to push updates and to receive payments instead of rolling my own. I went for PouchDB to sync my data which will probably give me a few issues with the Packaged Apps since it uses eval in some places but I'll deal with that later.
The way to do a desktop app using web technologies that feels more "real" is with node-webkit: https://github.com/rogerwang/node-webkit
We did this project in collaboration with Google, and they were great. We wouldn't have done it at all otherwise. But, I still do want to create a node-webkit app, because I think that's what users want, a normal app, not some weird hybrid thing.