Yes, because it was current content for 8 months, until patch 10.0 came out. The Forbidden Reach will be current content for six weeks.
It will still be relevant in 10.1 for gearing alts-- basically we just got the 10.1 catch-up mechanisms a month before 10.1 releases, which I thought was pretty neat. Hopefully they continue that for 10.2 and beyond.