So if you have 35 megabits down, now you have 35 megabits up. 75 down, 75 up, etc...
Granted, not everyone has FIOS, or can get it, but it may well provide pressure to others (Comcast we're looking at you) to match it.
Cable's limitations on upstream bandwidth are architectural and not caused by their normal asshole business practices.
Even the latest and greatest DOCSIS 3.0 hardware being rolled out to consumers is limited to bonding 4 upstream channels.
Cisco's literature says it's capable of 120 Mbits upload, but that seems a little optimistic, and I don't know where they pulled 30 Mbit/channel from.
In some markets, Comcast has pulled fiber to the home and offers 505/100 Mbit service, but the rest of their markets only have a maximum 150/20 Mbits option.
The reality is that the vast majority of home users don't require significant upload bandwidth and, other than playing numbers games in markets where they have direct competition, Comcast has no compelling reason to do anything about it.
I recall reading this article in 2012. It talks about ways that cable could upgrade its DOCSIS 3.0 setup to boost upload bandwidth, but concludes nothing will happen until DOCSIS 3.1 show up. That article was written 2 years ago and 3.1 infrastructure isn't expected to be widely rolled out until 2016/2017.
TLDR: Comcast doesn't care about your upload speeds.