I’ve used Otoy’s X.OI website to stream the Unreal Paris demo from the cloud. It’s in beta but it works. I even ran it on my iphone. Also ran Blender and was able to render stuff on my phone lol. Basically you upload your app on their site and you can stream it from there. They run it on good computers. You can even give your client a url/code they can use to stream the app from your account. It won’t be free but it’s really not expensive…3-4$ per hour I think. Beta offer I think 100 mins for free!