Youll need touse one of these methods
http://stackoverflow.com/questions/1588 ... del-loader
I recommend the blender exporter. i dont want to get carried away with the number of importers so for now only .js is fully supported, ill leave it up to other programs to handle conversion.
Its easy to import obj, but you should convert all files to a specific json format as mentioned above. Its not at all too difficult. as for the questions about crosswalk, im not sure if itll work as i have only tested extensively in browsers, however since crosswalk is basically chrome, and the plugin runs on my nexus 5 in chrome for android, so i think it'll work just fine. Test it and see:
Mobile Morph Demo (double tap for fullscreen)
The performance will vary depending on how much your trying to do, but its definitely slower than 2D by virtue of being 3D with way more to do in regard to rendering. It shouldnt break leadbolt ads but i havent tested since i do not own the plugins. I'm unaware of how they implement advertisements either so i can't make a guess as to if they'll work. As long as they don't modify the DOM they should, and if they do you have options to use which should allow the ads to display anyway with a small amount of work. Also note it requires webgl so it cant work on every phone. It also cannot be minified yet either do to some difficulties i have yet to work out.
Overall this plugin is geared towards native/desktop browsing. Phones poorly support webgl so i havent invested a great deal of effort into testing on them, although you can try running one of the demos on your mobile (morph mobile demo) to see what performance is like in simple projects. XDK should work though since this demo runs fine in chrome for android, ill have to test it but i have no time atm.