An upgrade in Ethereum might have a positive impact on the cryptocurrency, which in turn might bring about an increase in price. As to what ETH price would be at the end of 2020, cannot be said, but there would be hope for the altcoin to attain a 2k range, if only it can reach its previous peak it attained in 2017.
You should not expect ethereum to reach those kind of prices, when this happened the ico craze was as strong as ever and people were excited with all kind of projects that promised to take over the market and replace bitcoin but now we know that is impossible and icos have shown they were scams all along and now the ieo market is going through the same process, so it is not like there is an interest in ethereum big enough to cause such abrupt increase in its price.