Re: with Bing
Remote Desktop Host - that isn't a Windows 8 with Bing problem, that is a Windows non-Pro "feature", you can RDP out, but not in with all versions of Windows 8 without the Pro or Enterprise name.
As to limitations on the Bing edition, there don't seem to be any, as far as the user is concerned. Unlike the Windows 7 Starter version, you aren't limited on the number of applications or apps you can launch (although the 1GB RAM is a limiting factor there). After the initial set-up is complete, the user can also select their prefered search engine.
For manufacturers, if the screen is under 10" in size, they get "with Bing" free, for 10" and above it is supposedly heavily discounted over standard Windows 8.1.