Cowen says McDonald's will upgrade 2,500 restaurants to its "Experience of the Future" technology by year-end, which includes digital ordering kiosks. The firm raises its rating on McDonald's to outperform from market perform and price target for the shares to $180 from $142. Same store sales estimate for 2018 raised to 3 percent from 2 percent. McDonald's shares hit an all-time high on Tuesday as Wall Street expects sales to increase from new digital ordering kiosks that will replace cashiers in 2,500 restaurants. Cowen raised its rating on McDonald's shares to outperform from market perform because of the technology upgrades,...