In general, tax hikes are bad, because the government caries little responsibility (look how reckless they have been with our budget/deficit to date). Giving more tax money to the govt. is like giving a loan to someone with a horrible credit score.
Also, this technology agenda is horrible. It is not the government's job gamble tax-payer money on business ventures (even ones as appealing as "green tech") - leave that to VCs and free markets.