I don't think it is a reason for increase in Ethereum price but it is certainly a positive fundamental news. Ethereum is actually pretty undervalued due to many reasons (ICO companies paying their expenses etc.).
There is still nothing said about the projects developed by Casper, Plasma and others, which will actually breathe new life into ethereum. What is worth only the promised scalability, initially in hundreds of thousands of transactions per second, and in the future - millions of transactions per second.
After that, ethereum will be able to just fly and will remain the most reliable and popular coin.