I get you might not be able to get certain sets right away such as a full set of Prison of Elders gear or Trials of Osiris gear, but assuming HoW has been out for a couple months, you're level 34 and you've had time to pretty much get the gear you want.
What will YOU be wearing around?
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Probably Prison of Elders or Trials gear. But I haven't seen all the Prison gear or it's perks so I'll have to see. As a side note, while it's nice that everyone won't look the same, I don't think it's a good decision that "everyone can be level 34", even without completing the highest level content. Level 34 should be reserved for those who complete the highest level endgame activities, be that PvP or PvE. It would have been better to allow old Raid gear to level up, but then offer many different variations of Prison and Trials gear with different appearance and perks. Then people would have incentive to complete those endgame activities multiple times for different sets, or to look different.