Citrix is not horribly expensive and users experience like I said (and you basically confirmed it) is net admins qualification - withouth the last you won't get anywhere (btw, performance depends on setup and what we have is awesome).
But I guess enough of Citrix - whether you like or not it allows accessing enterprises from practically any platform.
And that is my point: you don't have to be tight to Windows (and you are "promoting" it very hard), iOS, Android or something else - just get yourself a tablet that fits your budget and that would be it for most part.