Without large numbers of precision weaponry, heavy bombers are useless; they are worse than useless, merely targets that can't hit anything themselves. Vietnam was the last war with an opportunity to carpet bomb things. Until China stockplies an arsenal of precision weapons, like JDAMs, it should stick with what it has. However, TU-22s would be useful because of the ASM role. However, for ground attack, a strike aircraft like an A-10, Tornado or Jaguar would suffice at present. The JF-17 could fufill this role, and probably will. (I feel kind of guilty, I haven't really read anything on the JF-17.)
And yes, Free Asia was right. Recently several Russian TU-22s were able to penetrate US air defences around the North Pole. The Air Force found out about it later, and investigated. I forget what they said the problem was, but the point is made, heavy bombers still do have their use-delivering curise missles and precision munitions.