Disc Sales: 'Planet Earth' a Chart-Topper on HD DVD, Blu-ray

Everything came up 'Planet Earth' on the next-gen sales chart for the week ending May 6, with the HD DVD and Blu-ray versions of the acclaimed BBC nature documentary commanding the No. 1 and No. 2 spots, respectively.

Though the Blu-ray format still enjoyed the overall lead in market share for the week (60 percent versus HD DVD's 40 percent), the HD DVD version of 'Planet Earth' edged out its Blu rival to snag the pole position on the Nielsen chart.

However, it was still a close race, with the Blu-ray version selling 95 copies to every 100 of the HD DVD version.

'Planet Earth' has become something of a sales surprise ever since it was first announced for next-gen release back in April. It quickly ascended up the Amazon rankings for all top-selling discs (including both DVD and high-def), with the HD DVD edition eventually hitting the highest placing so far for a next-gen title.

Also scoring high on the next-gen sales chart for the week of May 6 were Fox's 'Night at the Museum' (No. 3), Buena Vista's 'Deja Vu' (No. 4) -- both Blu-ray exclusives -- and Paramount's cross-format bow of the Oscar-winner 'Dreamgirls' (No. 5).