(Image credit: Tom's Hardware) If you want a massive OLED gaming monitor for work and play, this MSI 49-inch ultrawide behemoth is now just $699 in Newegg's Prime Day rival sale . Usually priced at $849, this $150 saving gets you a massive 49-inch panel with HDR 400, 144Hz refresh rate, and more. Grab this deal at Newegg While there are Prime Day monitor sales aplenty, Amazon can't match this Newegg price on the 491CQP. This monitor would be ideal for someone who wants an expansive display for productivity as well as gaming, and it's the perfect alternative to a setup with lots of different monitors scattered all over your desk. This is a great display solution for someone who wants to just buy one monitor and never think about display real estate for years. While it doesn't have 4K resolution, the 5120 x 1440 resolution is the equivalent of having two 1440p monitors side-by-side. The quantum dot OLED panel offers 1.07 billion colors, DisplayHDR True Black 400, and a 144Hz refresh rate.…