Yes, that's way I said "end-user". If you don't know what java is, this does not affect you.
Is that "end-user" enough for you? All busness owners in the country and all other general population doing eGovernment?
Even if the webbrowser that displays the intranet applets is used to surf the internet it's not a attac surface as you have to whitelist every site that's able to use applets.
That's for OTP though, users with tokens or keyfile have to use the OpenSign applet still. Haven't seen any stats, but OpenSign usage is probably pretty small compared to standard NemID/OTP.