In general the home theater market this year was pretty quiet. Nothing too much came out, just a lot of refinements to existing lines, with the mainstreaming of LED-based TV sets. Blu-Ray players have been pretty active though, with many coming in sub-$100 now, so I'd put Blu-Ray players as a category for sure.
As for video games, I could see adding Video Game Hardware. You had some decent activity in this area with the DSi, PSP Go, PS3 Slim, Wii Motion+, and price drops on the PS3 and Wii.
Also, Smartphones is a great category. We had it last year, and I'd argue it's even more important this year with all the Android stuff becoming a lot more refined.
I'd probably get rid of GPS Receivers as a category.
So in general:
Keep - Blu-Ray Players, Smartphones, Laptops, Netbooks, TVs, Video Games
Lose - GPS Receivers, MP3 Players, maybe A/V Receivers
Add - Video Game Hardware, maybe Car A/V Head Units