Users have already won on that front in that companies who sell PCs can't void your warranty for getting rid of all the extra crap that comes on it. This situation is a little strange, however, because rooting and such doesn't void the manufacturers warranties, just the carrier warranties. Realistically this is something that might not get dealt with legally until further down the road. We now how TVs coming with full OSes so it will be interesting to see what comes of that. Regardless, unless you're messing with the processor or other hardware it's ridiculous to void warranties because of rooting or flashing Roms as a whole. It's a completely different story if you hardbrick, though even in that case charging customers more than a nominal fee is ridiculous.