Your HDTV is the centerpiece of your home theater. Check out these five projects that work with your PC, smartphone, and streaming set-top box to make your TV the best that it can be.Your TV has come a long way from the days of rabbit-ear antennas and VHS players. No longer must you suffer the indignity of having to rewind a tape before returning it to Blockbuster, or of bribing a small child to hold the antenna in just the right position so you can enjoy fuzz-free viewing of Hawaii Five-O (the Jack Lord version, not the remake). Don't get complacent, though: You're still probably not on the cutting-edge yet. Have a pile of remote controls...